Question

Anne's average marks for eight subjects were 72. When she received the marks for French which was the ninth subject the average dropped to 70. What was her French mark? ​

Answer 1

Answer: 54 points

Explanation:

To find the score, we must first find the sum of the first eight scores by multiplying the average with the number of subjects so that is 72 × 8 = 576, now to find the sum of the nine scores, we can use the same way we used with the eight scores which is avg. × amount = 70 × 9 = 630, now take 576 and subtracting from 630 to get 630 - 576 = 54