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Question
Choose the correct alternative answer for the following question.
What is the probability of the event that a number chosen from 1 to 100 is a prime number ?
Options
`1/5 `
`6/25 `
` 1/4`
`13/50`
Solution
Sample Space (S) = {1, 2, ......, 100}
∴ n(S) = 100
Event A: a prime number
A = {2, 3, 5,.....97}
∴ n(A) = 25
`therefore P(A) = (n(A))/(n(S))`
`=25/100`
`=1/4`
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