Answer:
There are 4845 ways to select four patrols
Step-by-step explanation:
Total number of students in 5 th grade = 20
No. of students selected for patrols = 4
We are supposed to find In how many ways can the four patrols be selected
We will use combination
Formula : [tex]^nC_r=\frac{n!}{r!(n-r)!}[/tex]
Substitute n = 20 and r = 4
So,the four patrols can be selected in no. of ways = [tex]\frac{20!}{4!(20-4)!}=4845[/tex]
Hence There are 4845 ways to select four patrols
