Average of 50 numbers is 38 . If two numbers 45 and 55 are discarded, average of remaining set of nu

English

Gujarati

Hindi

4.Average

easy

The average of $50$ numbers is $38 .$ If two numbers $45$ and $55$ are discarded, the average of the remaining set of numbers is

A

$38.5$

B

$37.5$

C

$37.0$

D

$36.5$

Solution

Average of the remaining set of numbers

$=\frac{50 \times 38-(45+55)}{50-2}=\frac{1900-100}{48}=37.5$

Standard 13

Quantitative Aptitude

Share

Similar Questions

The average of $11$ results is $50 .$ If the average of the first six results is $49$ and that of the last six is $52.$ The sixth result is

easy

Five years ago, the average age of $P$ and $Q$ was $15 \,year.$ Now, average age of $P , Q$ and $R$ is $20 \,year.$ What whould be the age of $R$ after $10$ $year$ in $year$ ?

medium

In the first $30$ overs of a cricket match, the run rate was $5.2 \,runs/over.$ What is the required run rate in the remaining $20$ overs to reach the target of $280$ runs?

easy

The arithmetic mean of the following numbers is $1,2,2,3,3,3,4,4,4,4,5,5,5,5,5,6,6,6,6,6,6,7,7,7,7,7,7,7$

medium

It rained as much on Wednesday as on all the others days of the week combined. If the average rainfall for the whole week was $3 \,cm $ then how much did it rain on Wednesday? (in $cm$)

easy