SOLUTION: The number of people writing a test is a prime number less than 200. The ratio of the people who pass to those who fail, could be: A) 82:83 B) 75:78 C) 76:81 D) 91:78

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Question 1136061: The number of people writing a test is a prime number less than 200. The ratio of the people who pass to those who fail, could be:
A) 82:83
B) 75:78
C) 76:81
D) 91:78
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!



These are the Prime between 1 and 200:
2, 3, 5,+7 ,+11,
13, 17, 19, 23, 29,
31,+37, 41, 43, 47,
53, 59, 61, 67, 71,
73, 79, 83,+89, 97,
101, 103, 107,+109, 113,
127, 131, 137, 139, 149,
151, highlight%28157%29, 163, 167, 173,
179, 181, 191,
193,+197, 199

notice that the sum+ of the people who pass and those who fail is a prime number:


A) 82%3A83->82%2B83=165->not a prime
B) 75%3A78->75%2B78=+153->not a prime
C) 76%3A81->76%2B81=highlight%28157%29->IS a prime
D) 91%3A78 ->91%2B78=169->not a prime

=> your answer is: C) 76%3A81