The average of runs of a cricket player of 10 innings was 32. How many runes must be made in his next innings so as to increase his average of runs by 4?
Solution:Option(D) is correct
Average after 11 innings = 36
Required number of runs = $( 36 × 11) - (32 × 10)$
Edit: For an alternative solution, check comment by Mohan Dand.
Edit 2: For yet another alternative solution, check comment by Sravan Reddy.
Error(s) Found !!!
Sravan Reddy (Mar 22'16 at 02:09)
=> If he needs to raise average to 36, he needs to score 36 + additional runs to raise all previous innings to 36
Average previous innings - 32 in 10 innings. so raise by 4 in each innings - 4*10 = 40.
Answer = 36+40 = 76!!
useless method.because every one needs simple method rather than fast track method.first of all people has to understand concept method.then adopt this method
No need to discourage a good effort. People have different requirements. Something which doesn't suit you might be a blessing for someone else.
thanks SARAVAN for nice solution...it is very easy and least time consuming
Mohan Dand (Jul 05'14 at 12:53)
\(\Rightarrow\) total runs \(T=10 \times 32=320\)
\(\Rightarrow\) in his next innings (i.e 11th innings ) he want to increase his avg 4 (i.e 32 to 36) so he need to score::
\(\Rightarrow\) total runs, \(=T=11 \times 36=396\)
\(\Rightarrow\) therfore the reqired score, \(=396-320=76\)
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