Bunuel
Official Solution:
On Christmas Eve, Santa began wrapping presents from his sack. He started wrapping the first present at 1:00 p.m. and finished wrapping the last one at 11:00 p.m. Did he wrap more than 120 presents during that period?
(1) During that period, Santa was interrupted three times by visits from reindeer needing attention.
This statement does not give us any useful piece of information. Not sufficient.
(2) Santa's average rate while he was wrapping was 15 presents per hour.
It's tempting to say that Santa was wrapping for 10 hours and thus he wrapped 10*15 = 150 presents. However, it's important to consider that the question specifically refers to the 'average rate WHILE he was wrapping.' The word 'while' indicates that Santa's wrapping rate applies only during the actual wrapping. The notion that there was no interruption would be an unsupported assumption. Hence we don't know how long Santa was actually wrapping and cannot calculate the number of presents he wrapped. Not sufficient.
(1)+(2) We still don't know the exact time of the interruptions, and given the unknown duration of the interruptions, we can't determine the actual time spent wrapping. Not sufficient.
Answer: E
They always learn to completly ignore statement 1 when trying to analyse statement 2
And the fact statement 1 talked about interuptions, made me take a stance that the question didn't say breaks specificaly so why should I assume there were?
Also, I work 8 hours a day that doesn't mean I dont get interupted
If Santa wraps for 10 hours at an average rate of 15 per hour, that includes breaks in my opinion...
But the GMAT is the devil
I answered B of course
Thanks Bunuel