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An Aspirant scored 98 in his 19th Mock CSAT and thus increases his average by 4. What is his average after the 19th Mock CSAT.


Options:
A .   22
B .   24
C .   26
D .   Cannot be determined
Answer: Option C
:
C

Let the average score after 18th  Mock CSAT be x.
1st  Method:- Weighted Average:  18x+9819=x+4;x=22 answer is  x+4=26, option (c).
2nd  Method:- Using Alligation


An Aspirant Scored 98 In His 19th Mock CSAT And Thus Increas...


Use the reverse gear approach now.


Put X = 22; we will get 18: 1; answer is x + 4 = 26, option (c).



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