Two dice are tossed simultaneously. Find the probability that the total is a prime number.
Answer: D
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A box has 6 black, 4 red, 2 white and 3 blue shirts. What is probability of picking at least 1 red shirt in 4 shirts that are randomly picked?
Answer: C
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Two friends A and B apply for a job in the same company. The chances of A getting selected is 2/5 and that of B is 4/7. What is the probability that both of them get selected?
Answer: A
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If a card is chosen from a standard deck of cards, what is the probability of getting a five or a seven?
Answer: C
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The probability that a prime number selected at random from the numbers (1,2,3, ..........35) is :
Answer: B
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An experiment whose outcomes has to be among a set of events that are completely known but whose exact outcomes is unknown is a
Answer: C
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Which of the following is not an example of a discrete probability distribution?
Answer: A
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What is the probability that a number selected from the numbers (1, 2, 3,..........,15) is a multiple of 4?
Answer: A
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A number is chosen at random among the first 100 natural numbers. Find the probability that the number chosen is prime.
Answer: A
There are 25 prime numbers in the set of the first 100 natural numbers. They are:
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89, and 97.
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The probability that a number selected at random from the first 50 natural numbers is a composite number is -.
Answer: B
The number of exhaustive events = ⁵⁰C₁ = 50.
We have 15 primes from 1 to 50.
Number of favourable cases are 34.
Required probability = 34/50 = 17/25.
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