This is the problem of how many permutations the set bbbgggggg has. The set has size n=9, and you choose p=3 boys.
You can calculate it as:
1/8 of 3 is 0.375
1/8 +3/1 = 3/8 = 0.375
Answer:
2.5 rounds to 3
Step-by-step explanation:
5 divided by (or 5/2) 2 is 2.5 and since its not a whole number you rounded by the ones and you get 3.