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The arithmetic mean of the numbers 30, x, 38, 84 and 96 is 58, what is the arithmetic mean of 96, 68, 84 130 and x?
The arithmetic mean of the numbers 30, x, 38, 84 and 96 is 58, what is the arithmetic mean of 96, 68, 84 130 and x?
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Answer:
Firstly we find x,
(Mean = Sum of observation ÷ No. of observation)
30 + x + 38 + 84 + 96 / 5 = 58
248 + x / 5 = 58
248 + x = 58 × 5
248 + x = 290
x = 290 - 248
x = 42
So, now we find mean of 96, 68, 84 130 and x
96 + 68 + 84 + 130 + x / 5
= 96 + 68 + 84 + 130 + 42 / 5
= 420 / 5
= 84 Ans.
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