Y can do a work in 2/3 the time it takes X. Z can do the same work in ¾ the time it takes Y.When all three are typing at the same time what fraction of their total work does Y do	Choose the correct choice from the following answers
A) 1/3	B) 4/13	C) 9/23	D) 8/29	E) 9/29
given the ratio of the time of y and x is 2/3 : 1   therefore the ratio of speed of the x and y becomes 2 : 3.   similarly the ratio of the speed of the z and y given as 4 : 3   therefore the speed of the y and z becomes 3 : 4.   now , comparing the ratio of the x,y and z   it becomes 2: 3 :: 3 : 4   hence the y is doing 3/9 hence it is doing 1/3 work.   1/3NSWER:1/3
<result>A</result>
Y can do a work in 2/3 the time it takes X. Z can do the same work in ¾ the time it takes Y.When all three are typing at the same time what fraction of their total work does Y do