Please help with this one question from my homework please i need it quickly

Question

Question 1: Eight different coffee mugs have to be arranged in a showcase. How many different arrangements are possible?

A.) 50,000

B.) 40,320

C.) 30,760

D.) 40,000

 

Question 2: Tina has 20 rings. In how many ways can she select a set of 3 rings?

A.) 1000

B.) 850

C.) 950

D.) 1140

Answer 1

Quation 1. P(8) = 8! = 40320. Answer B.)

Quation2. C(20, 3) = 20·19·18/(1·2·3) = 1140 Answer D).