Average Practice Test 2

Question : 18 of 40

Marks: +1, -0

The average marks obtained by 15 students including x is 70 and the average marks obtained by 14 students excluding x is 68. What are the marks obtained by x?

78
98
88
None of these

Validate

Solution:

Average marks of 15 students excluding x = 68
Total marks of 14 students
x = 14 × 68
x = 952
Average mark of 15 students including x = 70
So,

{x+X}/15=70

{952+X}/15=70

X = 1050 - 952

X = 98

marks

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