If 7 persons can do 7 times of a particular work in 7 days, then, 9 persons can do 9 times of that work in
? Choose the most appropriate option:  A) 3 days  B) 8 days  C) 9 days  D) 11 days  E) 7 days

Rationale: that is , 1 person can do one time of the work in 7 days . therefore , 9 persons can do 9 times work in the same 7 days itself . option ' e '
Answer: E