Pretty sure the first one is C
Answer:
There is a 60.00 percent probability of a particular outcome and 40.00 percent probability of another outcome.
The answer is C)an exterior angle
Answer: 680
Step-by-step explanation:
When order doesn't matter,then the number of combinations of choosing r things out of n = 
Given: Total participants = 17
From these, a group of 3 participants is to be tested under a special condition.
Number of groups of 3 participants chosen = 

Hence, there are 680 groups of 3 participants can be chosen,.