Question

A drawer contains 4 red socks, 3 white socks, and 3 blue socks. Without looking, you select a sock at random, replace it, and select a second sock at random. What is the probability that the first sock is blue and the second sock is red?
A. 3/ 5
B. 7/20 7/20
C. 3/25
D. 7/100

Answer 1

What is the probability that the first sock is blue?

Answer 2

3 blue socks

Answer 3

When I flip a coin what is the probability that I will get a head?

Answer 4

1/2

Answer 5

How do you get that?

Answer 6

So how many socks are in the drawer?

Answer 7

its because the coin 2 sides so it would be a half

Answer 8

So how many socks are in the drawer?

Answer 9

10

Answer 10

How many of them are blue?

Answer 11

3

Answer 12

So if there are 10 socks and 3 of them are blue what is the probability that I will draw out a blue sock?

Answer 13

3/10

Answer 14

Good. So I draw out the blue sock, put it back in the drawer and draw another sock. What is the probability that the next sock I draw is red?

Answer 15

4/10

Answer 16

Good. Now to find the probability that I draw out blue, replace it, and draw out red, multiply those two individual probabilities.

Answer 17

12 so what is the answer ?

Answer 18

Do you know how to multiply fractions?