Question

Anil's mean score in 4 tests is 65. He wants to increase his mean by 7 marks. How many marks must he score in his 5th test?

a) 58
b) 70
c) 72
d) 75

Answer 1

d) 75. Anil must score 35 marks in his 5th test to increase his mean score by 7 marks.

Step-by-step explanation:

To increase his mean score by 7 marks, Anil needs to score 7 marks above the current mean score. Since there are 5 tests in total, the sum of his scores needs to increase by 5 times the increase in the mean score. Therefore, Anil must score 7 x 5 = 35 marks in his 5th test. The correct option is d) 75.