sudzpwc wrote:
In a nationwide poll, N people were interviewed. If 1/4 of them answered "yes" to question 1, and of those, 1/3 answered "yes" to question 2, which of the following expressions represents the number of people interviewed who did NOT answer "yes" to both questions?
A. N/7
B. 6N/7
C. 5N/12
D. 7N/12
E. 11N/12
\(Let , N = 12 (LCM of 3 & 4)\)
\(Q1_y = 3\) ; \(Q1_n = 9\)
\(Q2_y = 1\) ; \(Q2_n = 2\)
So, \(Q1_n + Q2N = 9 + 2 = 11\)
Quote:
expressions represents the number of people interviewed who did NOT answer "yes" to both questions?
Statistics : Posted by Abhishek009 • on 02 Nov 2003, 14:41 • Replies 22 • Views 57781
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