Question

An integer is picked from among 1 to 20 find probability of picking of prime

Answer 1

2,3,5,7,11,13,17,19 Total-8 8/20=2/5

Answer 2

there are total of 8 prime numbers between 1 and 20 ( remember 1 is neither prime nor composite) . so probability of picking a prime number will be 8/20 = 2/5 = 0.4 hope it helps u. best of luck