A and B complete a work in 6 days. A can alone can do it in 10 days. If both can together can do the work in how many days?  Choose one:	A) 7	B) 3.75	C) 2	D) 1	E) 8

Rationale: 1 / 6 + 1 / 10 = 8 / 30 = 4 / 15 15 / 4 = 3.75 days answer b
Answer: B