If 8 men or 12 women can do a piece of work in 30 days, in how many days can the same work be done by 6 men and 11 women? Select the correct option:
A) 10 days	B) 11 days	C) 13 days	D) 15 days	E) 18 days

Rationale: "8 men = 12 women ( i . e 2 men = 3 women ) 12 women 1 day work = 1 / 30 soln : 6 men ( 9 women ) + 11 women = 20 women = ? 1 women 1 day work = 12 * 30 = 1 / 360 so , 20 women work = 20 / 360 = 1 / 18 ans : 18 days answer : e"
Answer: E