Question

What is the probability that a number selected from numbers 1,2,3,...,30, is prime number, when each of the given numbers is equally likely to be selected?

Answer 1

HEY.....

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THERE ARE TOTALLY 30 NO. FROM 1-30

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NOW THE PRIME NO BETWEEN 1 TO 30 ARE

2
3
5
7
11
13
17
19
23
29
31
37
41
43
47

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MEANS THERE ARE TOTALLY 15 PRIME NO.

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PROBABILITY = PRIME NO. / TOTAL NO.

PROBABILITY = 15/30

PROBABILITY = 1/2

OR 0.50%

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