Question

Devi scored 66 marks for her first class test and

72 marks for her second class test. What is the
minimum mark she must score for her third class
test to meet her target of obtaining an average of
75 marks or more for the three tests?

Answer 1

She must score an 87 to obtain an average of 75.

Explanation:

(66+72+x) / 3 = 75

x = 87