Answer:
Here you go :)
Step-by-step explanation:
No, permutation is for finding out orders like how many ways can you arange the letters x,y,z the answer is 6, because xyz, xzy, yxz, yzx, zyx, zxy
permutations are a branch of probability
probability is (desired outcomes)/(total possible outcomes) or
10/total people registered
13. Is 18
15. Is 86
17 is 5
19 is 15
21 is 24
23 is 29
If ir means not, then irrational means not rational. Pi is and irrational number.