Question 1 :
Five cards—the ten, jack, queen, king and ace of diamonds, are well-shuffled with their face downwards. One card is then picked up at random. What is the probability that the card is the queen?
Question 2 :
What probabilities are based on the results of actual experiments and adequate recordings of the happening of the events?
Question 3 :
If P(E) = 0.05, what is the probability of ‘not E’?
Question 4 :
In the eighteenth century French naturalist Comte de Buffon tossed a coin 4040 times and got 2048 heads. What is the experimental probabilility of getting a head, in this case?
Question 5 :
A box contains 5 red marbless, 8 white marbless and 4 green marbless. One marble is taken out of the box at random. What is the probability that the marble taken out will be white ?
Question 6 :
Probability of an event E + Probability of the event ‘not E’ =
Question 7 :
A game consists of tossing a one rupee coin 3 times and noting its outcome each time. Hanif wins if all the tosses give the same result i.e., three heads or three tails, and loses otherwise. Calculate the probability that Hanif will lose the game.
Question 8 :
A baby is born. It is a boy or a girl. Does this statement have equally likely outcomes or not?
Question 9 :
What is the probability of an event which is impossible to occur ?
Question 10 :
A student argues that there are 11 possible outcomes as the sum on two dices which are 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12. Therefore, each of them has a probability $\frac{1}{11}$. Do you agree with this argument?
Question 11 :
A baby is born. It is a boy or a girl. Does this statement has equally likely outcome or not?
Question 12 :
A carton consists of 100 shirts of which 88 are good, 8 have minor defects and 4 have major defects. Jimmy, a trader, will only accept the shirts which are good, but Sujatha, another trader, will only reject the shirts which have major defects. One shirt is drawn at random from the carton. What is the probability that it is acceptable to Sujatha?
Question 13 :
Two dice, one blue and one grey, are thrown at the same time. Write down all the possible outcomes. What is the probability that the sum of the two numbers appearing on the top of the dice is less than or equal to 12?
Question 14 :
A box contains 5 red marbles, 8 white marbles and 4 green marbles. One marble is taken out of the box at random. What is the probability that the marble taken out will be not green?
Question 15 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19bea273b230584979a41.PNG' />
A game of chance consists of spinning an arrow which comes to rest pointing at one of the numbers 1, 2, 3, 4, 5, 6, 7, 8, and these are equally likely outcomes. What is the probability that it will point at 8 ?
Question 16 :
Fill in the blanks: The probability of an event is greater than or equal to _____ and less than or equal to _____.
Question 17 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19a5d273b23058497992d.PNG' />
In the above image, a child has a die whose six faces show the letters as given. The die is thrown once. What is the probability of getting A?
Question 18 :
Two players, Sangeeta and Reshma, play a tennis match. It is known that the probability of Sangeeta winning the match is 0.62. What is the probability of Reshma winning the match?
Question 19 :
A trial is made to answer a true-false question. The answer is right or wrong. Does this statement have equally likely outcomes or not?
Question 20 :
If two coins are tossed simultaneously there are three possible outcomes—two heads, two tails or one of each. Therefore, for each of these outcomes, the probability is $\frac{1}{3}$⋅ Yes/No
Question 21 :
A lot of 20 bulbs contain 4 defective ones. One bulb is drawn at random from the lot. What is the probability that this bulb is defective?
Question 22 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19bee273b230584979a45.PNG' />
A child has a die whose six faces show the letters as given above. The die is thrown once. What is the probability of getting A?
Question 23 :
Which of the following cannot be the probability of an event?
Question 24 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19a59273b230584979928.PNG' />
In the above image, gopi buys a fish from a shop for his aquarium. The shopkeeper takes out one fish at random from a tank containing 5 male fish and 8 female fish. What is the probability that the fish taken out is a male fish?
Question 25 :
Fill in the blanks: The probability of an event that is certain to happen is _______. Such an event is called _________.
Question 26 :
There are 40 students in Class X of a school of whom 25 are girls and 15 are boys. The class teacher has to select one student as a class representative. She writes the name of each student on a separate card, the cards being identical. Then she puts cards in a bag and stirs them thoroughly. She then draws one card from the bag. What is the probability that the name written on the card is the name of a boy?
Question 28 :
A game consists of tossing a one rupee coin 3 times and noting its outcome each time. Hanif wins if all the tosses give the same result i.e., three heads or three tails, and loses ofherwise. Calculate the probability that Hanif will lose the game.
Question 29 :
A box contains 5 red marbless, 8 white marbless and 4 green marbless. One marble is taken out of the box at random. What is the probability that the marble taken out will be not green?
Question 30 :
A die is thrown twice. What is the probability that 5 will not come up either time?
Question 31 :
A lof consists of 144 ball pens of which 20 are defective and the ofhers are good. Nuri will buy a pen if it is good, but will not buy if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that she will not buy it ?
Question 32 :
A piggy bank contains hundred 50 p coins, fifty Rs.1 coins, twenty Rs.2 coins and ten Rs.5 coins. If it is equally likely that one of the coins will fall out when the bank is turned upside down, what is the probability that the coin will be a 50 paise coin ?
Question 33 :
In a musical chair game, the person playing the music has been advised to stop playing the music at any time within 2 minutes after she starts playing. What is the probability that the music will stop within the first half-minute after starting?
Question 34 :
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting a king of red colour.
Question 35 :
Two customers Shyam and Ekta are visiting a particular shop in the same week (Tuesday to Saturday). Each is equally likely to visit the shop on any day as on another day. What is the probability that both will visit the shop on the different days?
Question 36 :
A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, find the probability that it bears a perfect square number.
Question 37 :
A bag contains a red ball, a blue ball and a yellow ball, all the balls being of the same size. Kritika takes out a ball from the bag without looking into it. What is the probability that she takes out the red ball?
Question 38 :
What is the probability of an event which is sure (or certain) to occur?
Question 39 :
Two customers Shyam and Ekta are visiting a particular shop in the same week (Tuesday to Saturday). Each is equally likely to visit the shop on any day as on another day. What is the probability that both will visit the shop on the same day?
Question 40 :
A carton consists of 100 shirts of which 88 are good, 8 have minor defects and 4 have major defects. Jimmy, a trader, will only accept the shirts which are good, but Sujatha, another trader, will only reject the shirts which have major defects. One shirt is drawn at random from the carton. What is the probability that it is acceptable to Jimmy?
Question 41 :
A die is thrown once. Find the probability of getting a number lying between 2 and 6.
Question 42 :
Two dice, one blue and one grey, are thrown at the same time. Write down all the possible outcomes. What is the probability that the sum of the two numbers appearing on the top of the dice is 8?
Question 43 :
Which of the following cannot be the probability of an event?
Question 44 :
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting a red face card.
Question 45 :
It is given that in a group of 3 students, the probability of 2 students not having the same birthday is 0.992. What is the probability that the 2 students have the same birthday?
Question 46 :
Find the probability of getting a head when a coin is tossed?
Question 47 :
A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is double that of a red ball, determine the number of blue balls in the bag.
Question 48 :
A die is thrown once. Find the probability of getting a prime number.
Question 49 :
A box contains 3 blue, 2 white, and 4 red marbles. If a marble is drawn at random from the box, what is the probability that it will be white?
Question 50 :
Fill in the blanks: The probability of an event is greater than or equal to _____ and lesss than or equal to _____.
