If 8 skiers raced down a course multiple times in one day, and each

Question

If 8 skiers raced down a course multiple times in one day, and each skier used a different pair of skis on each run, what is the total number of different skis used by the 8 skiers during the day?

(1) No skier shared any skis with any other skier.

(2) Each skier made exactly 12 runs during the day.

msk0657 · Answer

There are 8 skiers raced and they raced multiple times in a day.

Stat 1: We can't infer from this to get total number of skis ..only based on no of runs we can get the info.

Stat 2:Each done 12 runs..actually 12*8 = 96....but we are not sure whether they exchanged the skis or not...Insufficient..

If we club both we get 96 exactly...

IMO option C is correct answer...

OA please...will correct if I missed anything..

BrentGMATPrepNow · Answer

Target question :    What is the total number of different skis used by the 8 skiers during the day?

Given : 8 skiers raced down a course multiple times in one day, and each skier used a different pair of skis on each run

Statement 1 : No skier shared any skis with any other skier.  
We aren't given any information about the NUMBER of runs each skier made. 
So,  there's no way to know how many different skis were used . 
Since we cannot answer the  target question  with certainty, statement 1 is NOT SUFFICIENT

Statement 2 : Each skier made exactly 12 runs during the day.  
Great, so the 8 skiers made 12 runs each.
(8)(12) = 96, so there were 96 runs in TOTAL. 
However, it's possible that the skiers were sharing skis between runs. 
As such,  there's no way to know how many different skis were used . 
Since we cannot answer the  target question  with certainty, statement 2 is NOT SUFFICIENT

Statements 1 and 2 combined    
Statement 2 tells us that there were 96 runs in TOTAL
Statement 1 tells us that no skis were shared. 
So, we can conclude that  96 different skis were used . 
Since we can answer the  target question  with certainty, the combined statements are SUFFICIENT

Answer =  C

Cheers,
Brent

akela · Answer

I think the answer is B because it says: " each skier used a different pair of skis on each run". So statement 1 is trying to lure to trap C. IMHO )

Somalika · Answer

Hi, To get the total number of different skis used we need to know how many times the skiers raced and how many skiers shared the skis? Because if the skiers shared their skis then the total number of different skis used will be less than the number of skis used had the skiers not shared the skis. From Statement 1 we just know that skiers did not share the skis but no information is given about the number of times they raced. Statement 2 provides number of runs but not the number of skiers who shared their skis. Combining these two statements we can get the number of different skis used during the day. Hence for me the answer is "C". This is my understanding, do correct me if its wrong.

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If 8 skiers raced down a course multiple times in one day, and each

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