Question

can anyone please teach me this sum...!!!!! ( through an easy method)
Please don't spam..!!!

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Answer 1

✯ Given :-

• There are 50 numbers.
• Each number is substracted from 53, then the mean of the numbers obtained is - 3.5.

✯ To Find :-

• Find the mean of the numbers.

✯ Solution :-

» Let, the 50 numbers be x

» And, the sum of the 50 numbers be 50x

» Hence, - 3.5 is substracted from the each number.

➣ According to the question,

⇒ $\dfrac{53 × 50 - 50x}{50}$ = - 3.5

⇒ $\dfrac{2650 - 50x}{50}$ = - 3.5

⇒ 2650 - 50x = - 175

⇒ - 50x = - 2650 - 175

⇒ - 50x = - 2825

⇒ x = $\sf\dfrac{\cancel{- 2825}}{\cancel{- 50}}$

➠ x = 56.5

$\therefore$ The mean of 50 numbers is 56.5 .

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Answer 2

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