Data Sufficiency

kulksnikhil wrote:#1 What is the median number of employees assigned per project for the projects at Company Z?

1) 25% of the projects at Company Z have 4 or more employees assigned tto each project
2) 35% of the projects at Company Z have 2 or fewer employees assigned to each project

kulksnikhil wrote: #2 One Kilogram of a certain coffee blend consists of X kilogram of Type I coffee and y kilogram of Type II coffee. The cost of the blend is C dollars per kilogram, where C=6.5x + 8.5y. Is x<0.8
1) y>0.15
2) C>= 7.3

aim-wsc wrote:

kulksnikhil wrote: #2 One Kilogram of a certain coffee blend consists of X kilogram of Type I coffee and y kilogram of Type II coffee. The cost of the blend is C dollars per kilogram, where C=6.5x + 8.5y. Is x<0.8
1) y>0.15
2) C>= 7.3

2#
AGAIN interesting problem.
check ( cautious) while dealing with ^IS^ & yes or no type of problems: they are notorious.

clearly single inequalities are not sufficient to have a solution.

so if we take both of given conditions simultaneously::::

we can check the formula by putting extreme values.
note that the given data has y is greater than 0.15 while
required problem asks us to check whether x is less than 0.8

(....that clearly tells us the answer as E)

still we should substitute some random value to x and y.
note that x+y=1 kg.

answer : together both taken insufficient.