Q13 of 79 Page 24

The mean of a, b, c, d and e is 28. If the mean of a, c and e is 24, what is the mean of b and d?

Mean = = 28

a + b + c + d + e = 28 * 5


= 140


= 24


a + c + e = 72


a + b + c + d + e – a – c – e = 140 - 72


b + d = 68


Therefore, mean =


=


= 34

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