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4.Average
easy
A batsman has a certain average of runs for $12$ innings. In the $13^{th}$ innings, he scores $96$ runs and thereby increasing his average by $5$ runs. What is his average after the $13^{th}$ innings ?
A
$48$
B
$64$
C
$36$
D
$72$
Solution
To improve his average by $5$ runs per innings he has to contribute $12 \times 5=60$ runs for the previous $12$ innings. Thus, the average after the $13^{th}$ innings $=96-60=36$
Standard 13
Quantitative Aptitude
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