Determine the number of ways a computer can randomly generate an integer between 10 and 20 (inclusive)that is a composite number (a composite number is a number that is not a prime number).
A)8
B)6
C)7
D)6
E)9

Question

Determine the number of ways a computer can randomly generate an integer between 10 and 20 (inclusive)that is a composite number (a composite number is a number that is not a prime number).
A)​8
B)​6
C)7
D)6
E)9

Quizplus · Accepted Answer

There are 11 integers between 10 and 20 inclusive. Out of these, the prime numbers are 11, 13, 17, and 19. Therefore, there are 7 composite numbers in this range. The computer can randomly generate any of these 7 composite numbers, so the number of ways it can do so is 7. Hence, the answer is C.

Determine the Number of Ways a Computer Can Randomly Generate