My result is as below:
1. A team score an average of x points for n games. I use "A" as point sum for n games,so
A/n=x => A=n*x

2. Team scores x point in next game, so
(A+y)/(n+1)=new average
Replace A with above result, we got
(x*n+y)/(n+1)

I got the answer A

I'm shocked that anyone actually finishes the test taking the advice on this website. x points per game for n games is nx points and thus nx + y points for n+1 games for an average of (nx + y)/(n+1). This is not a math test. Students who think are supposed to write down equations and solve them are the ones who score poorly. 3/4 of the quant can be answered in your head in 20 seconds without doing anything. Advice from a 790 scorer who wrote nothing down for at least 30 of the quant problems.

Forget conventional ways of solving math questions. In PS, IVY approach is the easiest and quickest way to find the answer.


If a basketball team scores an average of x points per game for n games and then scores y points in its next game, what is the team's average score for the n + 1 games?

A. nx+y/n+1
B. x+ y/n+1
C. x+ y/n
D. n (x+y)/n+1
E. x+ny/n+1



Since the average scores of n games is x, the total scores of n games is nx. After one more game with y points the total score is nx+y and the total number of games is n+1. So the average score of n+1 games is (nx+y)/(n+1). So the answer is A.



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