Question 155211
Let x=number of games she bowled.
Average=total scores of all games bowled / x
178(x+1)=177x+199
178x+178=177x+199
x=21 number of games bowled to get 177 average.
The 199 score was game #22
.
Let y=the game score required to raise her average to 179.
(178*22)+y=179*23
3916+y=4117
y=201
.
Ed