IMO E finding 2: most of the orders by people under 35. finding 1: 30% of subscribers under 35 placed order. as most of the orders by people less than 35, but subscribers under 35 contributed only 30% which can't be considered most, it means many orders were places by people who are nt subscribers..

first one IMO A?

in your explanation you have assumed that volunteers didn't went on Monday. This is an assumption that you are making and nothing is mentioned about this.

x>y?? B) x^3 >y x=2, y=3. b) satisfies but x<y and x=10,y=3 satisfies both condition. Insufficient A) root(x) > y if x=1/4, sqrt(x)=1/2. if y>1/4 and y<1/2, only one condition will satisfy. Thus insufficient A&B) x <0 is not possible as sqrt (x)>0 is given. if y<0, then all conditions satisfy. x...

we know p^2 + b^2 = h^2 in a right angles triangle.
Thus let the side of A1 be p, A2 be b and A3=h.
a1 = pi * (p/2)^2 * 1/2 (=pi*r^2 / 2)
= pi/8 * p^2
similarly a2 = pi/8 * b^2
and a3 = pi/8 * h^2
Thus putting in (a1+a2)/a3 = p^2 + b^2 / h^2 = 1
IMO A

not D because he is already willing to work hard...... Then it should take less than 10 and not 20..

The sum of the integers in list S is the same as the sum of the integers in list T. Does S contain more integers than T? (1) The average (arithmetic mean) of the integers in S is less than the average of the integers in T. (2) The median of the integers in S is greater than the median of the intege...

My solution: standard deviation (sd) means how far the numbers are from the mean...
the present numbers are 2,4,5,7
if we add 3 or 6, they lie in the range only and similarly 1,8 re just next to 2 and 7 respectively which are already in the set. 14 is too far from 7, and thus will increase sd the most