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1. A number is chosen at random from 1 to 25. Find the probability of not selecting a prime number.

2. A number is chosen at random from 1 to 25. Find the probability of not selecting a composite number.

Respuesta :

prime numbers are 2,3,5,7,11,13,17,19,23 that's 9 of them the other 16 are not prime (1,4,6,8,9,10,12,14,15,16,18,20,21,22,24,25)
so 16/25 or 64% is the probability of not getting a prime number

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