Question

Kelly is playing a computer game to help her learn about science .Her scores for the first six games were 10,12,10,8,14, and 15. How any points does she needs to earn on the next games so that her average score for all games is 12 points

Answer 1

(10+12+10+8+14+15+x)/7=12
(79+x)/7=12
79+x=84
x=5

Check: (10+12+10+8+14+15+5)/7=12
84/7=12
12=12

Kelly has to score 5

Answer 2

The answer is 15 here.