6. You own 5 pairs of jeans and want to take 2 of them with you on vacation. In how many ways can you
choose 2 pairs of jeans?
A.10 ways
B.15 ways
C. 4 ways
D. 20 ways
D. 20 ways
To find out the number of ways you can choose 2 pairs of jeans out of 5, you can use the combination formula. The formula for combinations is given by:
nCr = n! / (r!(n-r)!)
In this case, you have 5 pairs of jeans, and you want to choose 2, so n = 5 and r = 2.
Plugging these values into the formula:
5C2 = 5! / (2!(5-2)!)
= (5 * 4 * 3 * 2 * 1) / (2 * 1 * 3 * 2 * 1)
= 10
Therefore, there are 10 ways you can choose 2 pairs of jeans out of the 5. So the answer is A. 10 ways.