Asked by Rebecca
What is the average of seven numbers if the average of the first two is 9 and the average of the last five is 15?
Answers
Answered by
Ms. Sue
2 * 9 = 18
5 * 15 = 75
18 + 75 = 93
93 / 7 = ?
5 * 15 = 75
18 + 75 = 93
93 / 7 = ?
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