The easiest way to do this question is by making up numbers. However, there's no need to make different numbers!
You have variables in the answer choices so you definitely want to find A and the plug it in, and it's an average question so you should immediately put down \(\frac{Sum}{Count=Avg}\)
We can make life easy for ourselves by saying there's only 2 people in the class so Count=2. We can say they're original score was both 90. The new scores would've been both 95.
Therefore, the new avg is simply 95!
Plug in 90 in the answer choices and see which gives you 95, which is A.
Just remember, variables in the answer choices don't do algebra. Plug and Chug!
Best,
Tae@SherpaPrep
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