simplify 8P3! . . . . . . . . . . . . . . . . A. 42 . B. 336********? . C.40,432 . D.56
permutations of 8 taken in groups of 3
= 8!/(8-3)! = 8!/5! = 8*7*6 = 336
yes
thank you for checking!
Simplify 8P3.
A. 42
B. 336
C. 40,432
D. 56
Answer: B. 336
Simplify 9C4.
A. 126
B. 15,120
C. 5
D. 3,024
Answer: A. 126
You and 3 friends go to a concert. In how many different ways can you sit in the assigned seats?
A. 6 ways
B. 12 ways
C. 24 ways
D. 10 ways
Answer: C. 24 ways
Explanation: There are 4 people who can sit in the first seat, 3 who can sit in the second seat after the first person has sat down, 2 who can sit in the third seat after the first two people have sat down, and 1 who can sit in the fourth seat after the first three people have sat down. So, the total number of ways you and your friends can sit is 4 x 3 x 2 x 1 = 24.
You own 5 pairs of jeans and want to take 2 of them with you on vacation. In how many ways can you choose 2 pairs of jeans?
A. 10 ways
B. 15 ways
C. 4 ways
D. 20 ways
Answer: D. 20 ways
Explanation: The total number of ways you can choose 2 pairs of jeans from 5 is 5C2 = (5x4)/(2x1) = 10.