Probability MCQs with Answers 2027

Q21

A bag contains 4 red balls, 6 blue balls and 8 pink balls. One ball is drawn at random and replaced with 3 pink balls. A probability that the first ball drawn was either red or blue in colour and the second drawn was pink in colour ?

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Q22

Open question

A bag contains 3 blue, 2 green and 5 red balls. If four balls are picked at random, what is the probability that two are green and two are blue?

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Q23

Open question

A basket contains 6 blue, 2 red, 4 green and 3 yellow balls. If 5 balls are picked up at random, what is the probability that at least one is blue?

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Q24

Open question

Three unbiased coins are tossed. What is the probability of getting at least 2 heads?

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Q25

Open question

In a simultaneous throw of two dice, what is the probability of getting a total of 10 or 11?

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Q26

Open question

From a pack of 52 cards, one card is drawn at random. What is the probability that the card drawn is a ten or a spade?

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Q27

Open question

A box contains 4 red, 5 green and 6 white balls. A ball is drawn at random from the box. What is the probability that the ball drawn is either red or green ?

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Q28

Open question

Three unbiased coins are tossed. What is the probability of getting at most two heads?

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Q29

Open question

A bag contains 6 red balls 11 yellow balls and 5 pink balls. If two balls are drawn at random from the bag. One after another what is the probability that the first ball is red and second ball is yellow?

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Q30

Open question

A man and his wife appear in an interview for two vacancies in the same post. The probability two of husband’s selection is

\frac{1}{7}

and the probability of wife’s selection is

\frac{1}{5}

. What is the probability that only one of them is selected?

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Q31

Open question

In a simultaneous throw of two dice, what is the probability of getting a total of 7?

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Q32

Open question

One card is drawn from a pack of 52 cards. What is the probability that the card drawn is either a red card or a king ?

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Q33

Open question

Two cards are drawn from a pack of 52 cards. The probability that either both are red or both are king, is-

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Q34

Open question

An urn contains 6 red, 4 blue, 2 green 3 yellow marbles. If two marbles are drawn at random from the run, what is the probability that both are red ?

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Q35

Open question

A basket contains 4 red, 5 blue and 3 green marbles. If three marbles are picked up at random what is the probability that at least one is blue ?

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Q36

Open question

A box contains 20 electric bulbs, out of which 4 are defective. Two balls are chosen at random from this box. The probability that at least one of them is defective, is -

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Q37

Open question

An urn contains 6 red, 4 blue, 2 green and 3 yellow marbles. If two marbles are picked up at random, what is the probability that either both are green or both are yellow ?

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Q38

Open question

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5 ?

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Q39

Open question

In a single throw of die, what is the probability of getting a number greater than 4 ?

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Q40

Open question

One card is drawn at random from a pack of 52 cards. What is the probability that the card drawn is a face card ?

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