Question

A batsman in his 11th innings makes a score of 68 runs and there by increase his average score by 2. what is his average score after 11th innings

Answer 1

Hey mate...


Here's your answer...

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$a = 68\\ d = 2 \\ n = 11 \\ \\ \\ \\ thus \: we \: need \: to \: find \: the \: sum \: after \: 11 \: innings \: \\ \\ \\ so \: s11 = 11 \div 2(2 \times 68 + 10 \times 2) \\ = 11 \div 2(136 + 20) \\ = 11 \div 2 \times 156 \\ = 11 \times 78 \\ = 858$


$his \: score = 68 + 10 \times 2 \\ = 88$

Thus...he made 858 runs...

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HOPE IT HELPS.....

@Rêyaañ11