Question

There are 3 red, 1 blue, and 2 yellow marbles in a bag. Once a marble is selected, it is not replaced.
Probability of red then blue

Answer 1

hmmm interesting, going to have to brush up on prob really quick

Answer 2

ok no problem

Answer 3

ok so this looks like the right track... but it's not exactly easy

Answer 4

http://www.onlinemathlearning.com/probability-without-replacement.html

Answer 5

so do you know the answer?

Answer 6

I like need help badly!

Answer 7

well, the red has to be selected first

Answer 8

so the probability of that is 3/6 (1/2)

Answer 9

now you need the next one to be blue

Answer 10

bu there are less reds left - one less in fact

Answer 11

so the probability of a blue at that point is 1/5

Answer 12

so that means the total probability is 1/2 * 1/5 = 1/10

Answer 13

so its 1/10?

Answer 14

yep

Answer 15

ok thnk you

Answer 16

np =)