Question

What is the probability of event that a number chosen from 1 to 20 is a prime number

Answer 1

total number- 20

prime numbers-2,3,5,7,11,13,17,19

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probability of an event=

no. of fav outcomes/total no of outcomes

8/20=2/5

ans..

hope it helps u

Answer 2

here is ur answer:

total outcomes = 20

prime no b/w 1 to 20 r -

2, 3, 5, 7,11, 13, 17, 19

fav. outcomes = 8

$p(a number chosen from 1 to 20 is a prime number) = \frac{total outcomes}{fav. outcomes } \\ \\ p(a number chosen from 1 to 20 is a prime number) = \frac{8}{20} \\ \\ p(a number chosen from 1 to 20 is a prime number) = \frac{2}{5}$

hope it helps you!