Sum of five numbers is 260 . average of first two numbers is 30 and average of last two numbers is 7

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The sum of five numbers is $260 .$ The average of the first two numbers is $30$ and the average of the last two numbers is $70 .$ What is the third number ?

A

$33$

B

$60$

C

$75$

D

Cannot be determind

Solution

Sum of first two numbers $=30 \times 2=60$

Sum of last two numbers $=70 \times 2=140$

$\therefore$ Third number $=260-140-60=60$

Standard 13

Quantitative Aptitude

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