Posted by **KiKi** on Friday, January 15, 2010 at 1:11pm.

A bag contains 7 red chips and 10 blue chips. Two chips are selected randomly without replacement from the bag. What is the probability that both chips are red?

- math/probability -
**PsyDAG**, Friday, January 15, 2010 at 1:22pm
Once the first red chip has been picked, there are only 16 total chips and 6 red chips remaining.

To find the probability that both (all) events occur, you need to multiply the probabilities of the individual events.

7/17 * 6/16 = ?

- math/probability -
**Hannah**, Wednesday, April 13, 2011 at 5:37pm
A box contains 25 yellow, 28 green and 38 red jelly beans.

If 13 jelly beans are selected at random, what is the probability that:

a) 5 are yellow?

b) 5 are yellow and 7 are green?

c) At least one is yellow?

- math/probability -
**Ben **, Sunday, April 17, 2011 at 9:51pm
the anwser is 4

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