Question

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.

• A. 22
• B. 24
• C. 26
• D. Cannot be determined

Answer 1

The correct option is C 26

Let the average score after ${18}^{th}$ Mock CSAT be x.

$1^{st}$ Method:- Weighted Average: $\frac{18x+98}{19}=x+4;x=22$ answer is $x+4=26$, option (c).

$2^{nd}$ Method:- Using Alligation

Use the reverse gear approach now.

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