Question 1 :
What is the probability of an event which is sure (or certain) to occur?
Question 2 :
What probabilities are based on the results of actual experiments and adequate recordings of the happening of the events?
Question 3 :
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 4 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19bf4273b230584979a4c.PNG' />
A die is numbered in such a way that its faces show the numbers 1, 2, 2, 3, 3, 6. It is thrown two times and the total score in two throws is noted. Complete the following table which gives a few values of the total score on the two thrones then what is the probability that the total score is at least 6?
Question 5 :
One card is drawn from a well-shuffled deck of 52 cards. Calculate the probability that the card will not be an ace.
Question 6 :
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 7 :
12 defective pens are accidentally mixed with 132 good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is taken out at random from this lof. Determine the probability that the pen taken out is a good one.
Question 8 :
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 9 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19a5c273b23058497992c.PNG' />
In the above image, 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 a number lesss than 9?
Question 10 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19bed273b230584979a44.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 a number less than 9?
Question 11 :
A die is thrown once. Find the probability of getting a number lying between 2 and 6.
Question 12 :
Fill in the blanks: The probability of an event is greater than or equal to _____ and lesss than or equal to _____.
Question 13 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19beb273b230584979a42.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 an odd number ?
Question 14 :
A die is thrown once. Find the probability of getting a number lying between 2 and 6.
Question 15 :
If P(E) = 0.05, what is the probability of ‘not E’?
Question 16 :
A die is thrown once. Find the probability of getting a prime number.
Question 17 :
A piggy bank contains hundred 50p 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 will not be a Rs.5 coin?
Question 18 :
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 19 :
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 20 :
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting a spade.
Question 21 :
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 22 :
A lot consists of 144 ball pens of which 20 are defective and the others 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 23 :
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 24 :
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting the queen of diamonds.
Question 25 :
One card is drawn from a well-shuffled deck of 52 cards. Calculate the probability that the card will be an ace.
Question 26 :
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting a face card.
Question 27 :
A player attempts to shoot a basketball. She/he shoots or misses the shot. Does this statement have equally likely outcomes or not?
Question 28 :
A die is thrown once. Find the probability of getting an odd number.
Question 29 :
A die is thrown once. Find the probability of getting a prime number.
Question 30 :
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 red ?
Question 31 :
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 32 :
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 consecutive days?
Question 33 :
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 yellow ball?
Question 34 :
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 blue ball?
Question 35 :
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 white ?
Question 36 :
A bag contains lemon flavoured candies only. Malini takes out one candy without looking into the bag. What is the probability that she takes out a lemon flavoured candy?
Question 37 :
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting a red face card.
Question 38 :
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 39 :
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting a king of red colour.
Question 40 :
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 ?
