SSC CGL 26 Oct 2014 Shift 2 Paper

Question : 112 of 200

Marks: +1, -0

In two successive years, 80 and 60 students of a school appeared at the final examination of which 60% and 80% passed respectively. The average rate of students passed (in percent) is

68%
68 $4/7$ %
70 %
72 $3/7$ %

Validate

Solution:

Total examinees = 80 + 60 = 140
Total successful examinees
=

{80×60}/{100}+{60×80}/{100}

= 48 + 48 = 96.
∴ Required percent
=

{96}/{140}

× 100 =

{480}/7

= 68

4/7

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