Question

If Dwight Johnson has 7 courses to choose​ from, how many ways can he arrange his schedule if he must pick 4 of​ them?

Answer 1

Answer:

35 ways

Step-by-step explanation:

$_7C_4=\frac{7!}{4!(7-4)!}=\frac{7!}{4!*3!}=\frac{7*6*5}{3*2*1}=\frac{210}{6}=35$

Therefore, Dwight can arrange his schedule in 35 ways if he must pick 4 out of 7 courses to choose from.