Question: there are 15 members in a family . it takes 180 days for a women to complete the work , however man completes in 120 days . they take 17 days to complete the work if men work on alternate days and women work every third day . if all of them started together on the 1 st day , then how many men are there in the family
A) 9
B) 10
C) 11
D) 12
E) 13
Correct answer: d
Grade: 7 | Topic: Expressions and Equations | Difficulty: Hard | Standard: 7.EE.B.3