1. If the average of 39, 48, 51, 63, 75, 83, x and 69 is 60, then the value of x is
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By: anil on 05 May 2019 01.58 am
it is given that average of 39, 48, 51, 63, 75, 83, x and 69 = 60 average = $$frac{Sum}{Number of Elements}$$ 60 = $$frac{Sum}{8}$$ Sum = 60 x 8 = 480 Sum = 39 +48+ 51+ 63+ 75+ 83+ x + 69 = 428 + x 428 + x = 480 x = 52
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