18/30=?/100
18 times 100 = 1800
1800 divided by 30
60%
Given a group of
n object. We want to make a selection of
k objects out of the n object. This can be done in
C(n, k) many ways, where

,
where k!=1*2*3*...(k-1)*k
Thus, we can do the selection of 3 cd's out of 5, in C(5,3) many ways,
where

Answer: 10
Answer:
Yea its correct! good job yea there are not any mistakes
Step-by-step explanation: