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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?

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?
asked 120k views
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?

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User Trichner
by
8.0k points

2 Answers

4 votes
15×4+8×3=60+24=84
84÷7=12
12 is supposed to be the answer.
answered
User Cody Wikman
by
8.1k points
2 votes
(8+15)/2. The answer is 12.5.
answered
User Chuck Rostance
by
8.3k points
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