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1. If the average of the four numbers M, 2M+3, 3m-5 and 5M+1 is 63 what is the value of the m?
- A. 11
- B. 11
- C. 11
- D. 11
Answer: Option B
Explanation:
(M + 2M + 3 + 3M - 5 + 5M + 1) / 4 = 63
or, (11M - 1) = 63 * 4
or, 11M = 252 + 1
or, 11M = 253
or, M = 253 / 11
or, M = 23
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