RRB NTPC Mains or Stage 2 Model Paper 7 with solutions

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DIRECTIONS (Q. 21-23): Study the following table carefully and answer the questions given below.
Percentage distribution of students in various disciplines in five different colleges

Question : 21 of 120

Marks: +1, -0

What is the average number of students from the discipline of Commerce from all the colleges together?

9745
9735
9720
9750

Validate

Solution:

a) Required average number of students

=1/{5×100 }[35 × 17500 + 45 × 25000 + 30 ×35300 + 48 × 23000 + 30 × 32400]

=1/5 [6125 + 11250 + 10590 + 11040 + 9720]

=1/5 × 48725 = 9745

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