kruttikaaggarwal wrote:
I do not understand why B is not possible?
Answer choice B says that 5.2 is a possible value of the range.
So, let's see what happens when the range = 5.2
We already know that 2a - 3.7 = the range
So, we get: 2a - 3.7 = 5.2
Add 3.7 to both sides to get: 2a = 8.9
So, in order for the range to equal 5.2, it must be the case that 2a = 8.9
HOWEVER, 2a CANNOT equal 8.9, since we're told that the values are listed in
ascending order, which means 2a must be greater than 9.2
If 2a must be greater than 9.2, then 2a cannot equal 8.9
Does that help?
Cheers,
Brent
Yep, that's VERY tricky, and it was specifically put in there by the PSYCHOmetricians to deliberately trick you up.