if the Arithmetic mean of number 27, 25, 23, x + 2 x-2, 17, 15 and 13 is 20 .find the value of x
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if the Arithmetic mean of number 27, 25, 23, x + 2 x-2, 17, 15 and 13 is 20 .find the value of x
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if the Arithmetic mean of number 27, 25, 23, x + 2 x-2, 17, 15 and 13 is 20 .find the value of x
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Step-by-step explanation:
(27 + 25 + 23 + x + 2 + x - 2 + 17 + 15 + 13)/8 = 20
120 + 2x = 8×20 =160
2x = 160 - 120 = 40
x = 20
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sum of all observations/ no. of observations
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