Question

A bag contains 4 white, 3 blue, and 5 red marbles. Find the probability of choosing a blue marble, then a red marble if the marbles are replaced.
A. 5/44
B. 15/35
C. 2/3
D. 1/15

Answer 1

How many blue marbles are there? How many total marbles are there? And how many red marbles are there?

Answer 2

3 blue, 12 total, and 5 red.

Answer 3

So do \[\frac{ blue }{ total }*\frac{ red }{ total }\]

Answer 4

15/144

Answer 5

so it is B

Answer 6

Well you can simplfy it to 5/48

Answer 7

but there is no 5/48 on the choices. And how do you simplify?

Answer 8

Are you sure the question doesn't say that they aren't replaced? Because we have the correct answer right now.

Answer 9

im sure

Answer 10

oh it says are not replaced, my bad

Answer 11

Well then let's go again\[\frac{ blue }{ total }*\frac{ red }{ total-1 }\]

Answer 12

15/143?

Answer 13

\[\frac{ 3 }{ 12 }*\frac{ 5 }{ 11 }\]

Answer 14

oh

Answer 15

15/132

Answer 16

Now do\[\frac{ 15 }{ 132 }\div \frac{ 3 }{ 3 }\]

Answer 17

5/44

Answer 18

Boom, that's your answer

Answer 19

thank you sooooo much!!!!

Answer 20

No problem :)

Answer 21

kk bye