Question

plz solve my question​

Answer 1

hey mate here your soln ☺

Sum of the deviations x1, x2, x3, xn from 50 is -10.

So, (x1 - 50) + (x2 - 50) + (x3 - 50) + (xn - 50) = -10

Or x1 + x2 + x3 + xn - 50n = -10

Or x1 + x2 + x3 + xn = 50n - 10 (1)

Sum of deviations of the values from 46 is 70

So, (x1 - 46) + (x2 - 46) + (x3 - 46) + (xn - 46) = 70

Or x1 + x2 + x3 + xn - 46n = 70

Or 50n - 10 - 46n = 70 [Using (1)]

Or 4n = 80

Or n = 20

That is total number of observations is 20.

So, sum of observations = x1 + x2 + x3 + xn = 50 . 20 - 10 = 990

And hence, mean of the data is 990/20 = 49.5

hope its help ful

☺✌✌

Answer 2

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hope it's help you

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thank you ❤❤