RRB Junior Engineer Stage 1 Model Papers 1

Question : 17 of 100

Marks: +1, -0

A piece of work was finished by A, B, and C together. A and B together finished 60% of the work and B and C together finished 70% of work. Who among the three is the most efficient?

A
B
C
A or B

Validate

Solution:

According to question,

A + B = 60%

∴ (A + B) + (B + C) – (A + B + C) = B

(60 + 70 – 100) = 30

∴ B = 30%

A = 30%

and

C = 40%

Hence, C is most efficient.

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