if X worked alone to take him 15 hours then y independently for18 hours if x alone to do first for 6 hours, two people were doing together for three hours, rest of job will be finished by y , and then y need how many hours to coplete? A)13/3hours B)17/3hours C)13/5hours D)16/3 hours D)16/5 hours e)2...

pump A can drain container in 3 hours, B can drain it in 2 hours and C can fill a full container in 6 hour opening A,B,C togather, if a container has full water, how many times does it drain the container will be half-full?

A)30 minutes
B) 45 minutes
C) 50 minutes
D) 60 mintes
E) 72 mintes

the answer is B

accourding to the direction on a can of Frozen orange juice concentrate 1 can of concentrate is to be mixed with 3 can of water to make orange jouice. How many 12-ounce cans of the concentrate are required to prepare 200 6-ounce serving of orange juice?
A)25
b)30
c)65
d)100

What fraction of this year's graduating students at a certain college are males?
1- of this year's graduating student, 33 % of the males and 20% of famales transferred from another college.
2- of this year's graduating students 25% transferred from another college.