There are seven shuffled question cards left in a game. Kim has to pick two of them and answer them both correctly to win. What is the greatest number of different pairs of question cards she can pick?

Total Question Cards 3 4 5 6 7
Number of Pairs 3 6 10

Question

There are seven shuffled question cards left in a game. Kim has to pick two of them and answer them both correctly to win. What is the greatest number of different pairs of question cards she can pick?

Total Question Cards 3 4 5 6 7 
Number of Pairs 3 6 10

anonymous · Answer

What happens if she picks two and gets it wrong?

anonymous · Answer

I don't know, but can you help me find the answer?

anonymous · Answer

I need the rules to know what's limiting her choice of pairs.

anonymous · Answer

A.	15 pairs	
B.	21 pairs	
C.	28 pairs	
D.	36 pairs

Which would be the correct answer

anonymous · Answer

OK, sounds like it's asking how many different original possibilities there are. There are seven cards for her first choice and six for her second, which makes 42 combinations, but because order doesn't matter divide by two to get....

anonymous · Answer

So what is your best answer?

anonymous · Answer

42/2...