Question

lots of numbers written from 1-20 are put in a box a lot is taken at random what is the probablity of getting a prime number

Answer 1

Answer:

7/20 is the correct answer.

Answer 2

Answer:

tthere are 8 prime no. in 1 to 20

these are = 2,3,5,7,11,13,17,19

then the sum of all prime digit= 8

probability of getting a prime no . = 8 / 20

= 2/5