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Ranjan Kumar Pal

· started a discussion

· 1 Months ago

Change way of solve (Question:109937.0)

Sir please easy way me baton na Jo exam k liye yaad rhe.....i.e 72x - 70(x+4) =80. But isme kuch mistake ho rha h mere se plz make me understand like this ......plz......plz......plz......
My WhatsApp no. Is 9555243133......please sir......please

Question:
The batting average of a cricket player is 72 runs per inning. In the next 4 innings, he could score only 80 runs and thereby decrease his batting average by 2 runs. What is the total number of innings played by him till last match?
Options:
A) 72
B) 88
C) 92
D) 104
Solution:
Ans: (d) Average runs in last 4 innings \(=\cfrac{80}{4}=20\) runs

Short from previous average = 72 - 20 = 52

Short (total) = 52 x 4

But, short runs (per innings) = 2 runs

\(\therefore\) Total inning played \(=\cfrac{52\times4}{2}=104\) innings

Knowledge Expert

· commented

· 1 Months ago

Dear student
Let the number of innings played by him till the last match = x
Hence, his number of innings before = x – 4
So, his runs scored when his number of total innings is x = (x – 4)*72
And runs scored finally = (x – 4)*72 + 80
His final average per innings after those last 5 innings = 72 – 2 = 70
Thus his runs = 70x
Therefore, (x – 4)*72 + 80 = 70x
x = 104

Regards
Team TR

kickass srk

· commented

· 1 Months ago

@Ranjan ... Ye samajh ... 72x+ 80 = 70(x+4) ...... isko solve kar ... x= 100 ata h.... Ques me x+4 puucha
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