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A. 3/5
B. 4/7
C. 2/5
D. 1/4

Part of work completed by Bilal in a day = 1/15 Part of work completed by Jalal in a day = 1/12 Part of work completed by them in a day = (1/15)+(1/12) = 3/20 Part of work completed by them in 4 days = (3/20)*4 = 3/5 Fraction of work left
= 1-(3/5)
= 2/5

Correct Answer: C. 2/5

Last Updated: November 19, 2019