RRB Group D 15-Oct-2018 Shift 1 Solved Paper

Question : 11 of 84

Marks: +1, -0

In a group of 300 students, every student studies 7 subjects and every subject is studied by 50 students. The number of subjects is :

Solution:

Total no of student

=300

every subject is studied by

=50

student
Number of subject

={300}/{50}=6

\ ∵

every student studied 7 subject

\∴

The number of subject

=6 \×7

=42

(exactly)

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