Answer:

Step-by-step explanation:
If we don't care about the order (like if we pick Bob then Joe vs Joe then Bob), then a formula is
where we are picking k items from a list of n items
In our case, n=22 and k=15
Therefore, there are 





Answer:
Step-by-step explanation:
Answer:
x
5
Step-by-step explanation:
Answer:1,2 & 4
Step-by-step explanation:
Just took the test