Average of price per kg of rice at 10 different places was Rs., 4.85. After a week, price per kg. wa

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The average of the price per $kg$ of rice at $10$ different places was $Rs.\, 4.85.$ After a week, the price per $kg.$ was increased by $20$ paise at $3$ places and decreased by $10$ paise at one place. The new average of price per $kg$ is in $Rs.$

A

$4.88$

B

$4.86$

C

$4.90$

D

$5.35$

Solution

The sum of price of per kg Rice at $10$ different places $=4.85 \times$ $10=48.5$

Increased price $=20 \times 3-10 \times 1=50$ paise

Sum of the increased price of rice at $10$ different places $=48.50$ $+0.50=49.0 Rs$

New Average $=\frac{49}{10}=4.90 Rs$

Standard 13

Quantitative Aptitude

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