Question

WILL GIVE 10 POINTS!!!

Elliot wrote a computer program that randomly generates a number from 2 to 10. If he runs the program twice, what is the probability that the number generated both times is a prime number?

2/15

1/6

16/81

9/20

Answer 1

There are 4 primes from 2 to 10, and 9 total results. So, he has a 4/9 chance for the first time, and a 4/9 chance for the second time. Multiplying will get you 16/81.