If 8 men or 12 women can do a piece of work in 20 days, in how many days can the same work be done by 6 men and 11 women?	Options.
A) 10 days  B) 11 days  C) 12 days  D) 15 days  E) 17 days

Rationale: "8 men = 12 women ( i . e 2 men = 3 women ) 12 women 1 day work = 1 / 20 soln : 6 men ( 9 women ) + 11 women = 20 women = ? 1 women 1 day work = 12 * 20 = 1 / 240 so , 20 women work = 20 / 240 = 1 / 12 ans : 12 days answer : c"
Answer: C