There are 50 numbers. Each number is subtracted from 53 and the mean of the numbers so obtained is found to be –3.5 . What is the mean of given numbes?
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There are 50 numbers. Each number is subtracted from 53 and the mean of the numbers so obtained is found to be – 3.5. Find the mean of the given numbers
Let x be the mean of 50 numbers.
∴ sum of 50 numbers = 50x
Since each number is subtracted from 53.
According to question, we have
53 × 50 - 50x / 50 = - 3.5
⇒ 2650 - 50x = -175 ⇒ 50x = 2825
⇒ x = 2825 / 50 = 56.5
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