9. brett has ten distinct t-shirts. he is planning on going on a short weekend trip to visit his brother in college. he has enough room in his bag to pack four t-shirts. how many different ways can he choose four t-shirts for his trip?

The number of ways are 210.

Step-by-step explanation:

Consider the provided information.

Brett has ten distinct T-shirts. He is planning on going on a short weekend trip to visit his brother in college. He has enough room in his bag to pack four T-shirts.

Since order doesn't matter so we will use combination.

Use the formula for combination

Substitute n=10 and r=4 in above formula.

Hence, the number of ways are 210.

answer: 0+0=0

step-by-step explanation:

that is the only answer that can make 0