If 3 girls can do 3 times of a particular work in 3 days, then, 7 girls can do 7 times of that work in  Choices.
A) 1 1 / 5 days	B) 2 days	C) 2 1 / 5 days	D) 3 days	E) 4 days

Rationale: answer : option ' d ' that is , 1 girl can do one time of the work in 3 days . therefore , 7 girls can do 7 times work in the same 3 days itself .
Answer: D