A) 2/7
B) 8/15
C) 7/15
D) 11/15
Correct Answer: B
Solution :
1 day work of A and B are \[\frac{1}{10}\] and \[\frac{1}{15}\] respectively 2 days work of \[A=\frac{2}{10}\,=\frac{1}{5}\] 5 days work of \[B=\frac{5}{15}=\frac{1}{3}\] \[\therefore \] They complete \[\left( \frac{1}{5}+\frac{1}{3} \right)=\frac{8}{15}\] work if they work for 2 and 5 days respectively
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