Average of 50 numbers is 30. If two numbers, 35 and 40 are discarded, then average of remaining numb

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The average of $50$ numbers is $30.$ If two numbers, $35$ and $40$ are discarded, then the average of the remaining numbers is nearly.

A

$28.32$

B

$28.78$

C

$29.27$

D

$29.68$

Solution

The sum of $50$ numbers $=50 \times 30=1500$

Discarding $35$ and $40,$ we get

Average of remaining $48$ numbers $=\frac{1500-35-40}{48}$

$=\frac{1500-75}{48}=\frac{1425}{48}=29.68$

Standard 13

Quantitative Aptitude

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