Question

Kayla, Alyssa, Juanita, Dominic, and Troy want to
go to a concert, but they only have three tickets.
They decide to select randomly who will go.

a How many different three-person groups can
be selected?

b What is the probability that Dominic will be
selected?

c What is the probability that Alyssa will not be
selected?

d How many different three-person groups can
be selected if Kayla must be a member?

Answer 1

have you even tried?

Answer 2

@sourwing hah well for A i got 10 groups..? I'm not sure about b or c

Answer 3

how did you get 10 for a?

Answer 4

@sourwing

Answer 5

1) Dominic cam go with 2 of the 4 people yes?

Answer 6

@sourwing 2 of the 5 people who want to go.

Answer 7

no no, there are 5 people including Dominic. So given that Dominic, he must go with 2 of the 4 remaining people yes?

Answer 8

@sourwing ah, then yes

Answer 9

so how many ways can you select 2 out of 4?

Answer 10

@sourwing 6 ways..?

Answer 11

correct.
so b) 6/10 = 3/5

Answer 12

@sourwing oh i see now, thank you