Question

How many ways can 4 student ma be chosen from a class of 30 students is ?

Answer 1

If the order doesn't matter then you have to apply the combination formula:

³⁰C₄ = (30!)/(4!)(30-4)! = 27,405 WAYS

Answer 2

That's we can solve by using a combination algorithm:
`C^4_(30)=(30*29*28*27)/(4*3*2*1) = 27405`