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In a set of numbers, the average of the first four is 15, and the average of the last three is 8. What is the average of all seven members?
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4 votes
In a set of numbers, the average of the first four is 15, and the average of the last three is 8. What is the average of all seven members?

User Trichner
by
7.8k points

2 Answers

4 votes
15×4+8×3=60+24=84
84÷7=12
12 is supposed to be the answer.
User Cody Wikman
by
8.1k points
2 votes
(8+15)/2. The answer is 12.5.
User Chuck Rostance
by
8.2k points
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