A batsman scores 87 runs in 21^{st} match of his career. His average runs per match increase by 2. h

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A batsman scores $87$ runs in the $21^{st}$ match of his career. His average runs per match increase by $2.$ What is his average before the $21^{st}$ match?

A

$45$

B

$46$

C

$44$

D

$43$

Solution

Average Score upto $20$ matches be $x$

$\frac{20 \times x+87}{21}=x+2$

$20 x+87=21 x+42$

$x=45$

Standard 13

Quantitative Aptitude

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