Test Details

Probability

Jan 19, 8:00 AM

60 minutes

Jan 19, 10:00 PM

30.0 marks

MCQ

15 questions

Upendra Joshi

B.Sc, M.A. Hindi & B.Ed

Class Details

Maths

Maths & Science Class 6 to 10 English Medium & Hindi Medium . Class 11 & 12 maths

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Question Text

Question 1 :
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting the queen of diamonds.

Question 2 :
A die is thrown twice. What is the probability that 5 will come up at least once?

Question 3 :
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 buy it ?

Question 4 :
What is the sum of the probabilities of all the elementary events of an experiment?

Question 5 :
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 6 :
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 7 :
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 8 :
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 9 :
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 10 :
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 11 :
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 12 :
Fill in the blanks: The probability of an event is greater than or equal to _____ and lesss than or equal to _____.

Question 13 :
A jar contains 24 marbles, some are green and others are blue. If a marble is drawn at random from the jar, the probability that it is green is $\frac{2}{3}$ ⋅ Find the number of blue balls in the jar.

Question 14 :
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 15 :
A die is thrown once. Find the probability of getting a prime number.

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