Haris can wash all the windows of his house in 10 hours. His wife Maggie can wash all the windows in 5 hours. How many hours will it take for both of them working together to wash all the windows?	Choose one:	A) 2	B) 3 1/3	C) 4 1/4	D) 5	E) 6
Work hrs=A3 1/3/(A+3 1/3)= 50/15 =3 1/3   Answer is 3 1/3
<result>B</result>
Haris can wash all the windows of his house in 10 hours. His wife Maggie can wash all the windows in 5 hours. How many hours will it take for both of them working together to wash all the windows?