Average Practice Test 3

Question : 11 of 40

Marks: +1, -0

There are three sections of class x consisting of 55, 60 and 45 students respectively. The average marks scored in an examination by section A is 50, B is 55 and C is 60. The average marks of all the sections are:

54.68
54
55.68
56.68
57

Validate

Solution:

Total marks of Section A = 55 × 50 = 2,750
Total marks of Section B = 60 × 55 = 3,300
Total marks of Section C = 45 × 60 = 2,700
∴ Required average

= { 2,750 +3,300+ 2,700 }/160=54.68

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