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The probability that number selected at random from that number 1, 2, 3, 4, 5, 6, 7, 8, …., 100 is prime is

A

0.4

B

0.25

C

0.45

D

0.43

Text Solution

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The correct Answer is:
B
Let E = Event of getting prime numbers from 1 to 100
` = {2,3,5,7,11,13,17,19,23,29,31,37,41,43,53,59,61,67,71,73,79,83,89,97}`
`therefore n(E ) = 25`
`therefore` Required probability
` = (25)/(100) = 0.25`
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