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the average of the five number was 6.8. If the first four numbers were 4.3, 5.2, 7, and 6.8, What was the fifth number?
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the average of the five number was 6.8. If the first four numbers were 4.3, 5.2, 7, and 6.8, What was the fifth number?

User Shan Kulkarni
by
8.2k points

1 Answer

4 votes
Let x be the fifth number

(4.3 + 5.2 + 7 + 6.8 + x)/(5) = 6.8
⇔
(23.3 + x)/(5) = 6.8
⇔ 23.3 + x = 34
⇔ x = 10.7
User Mitchnull
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