Saturday

August 30, 2014

August 30, 2014

Posted by **John** on Sunday, September 27, 2009 at 7:23am.

1. In a large box are 20 ping-pong balls—10 of them are red and numbered 1 through 10, and the other 10 of them are green and also numbered 1 through 10. Two balls are selected from the box without replacement.

1.

a.Find the probability that the first ball selected is red and even.

2.

b.Find the probability that the first ball selected is red OR even.

- Math/Statistics -
**PsyDAG**, Sunday, September 27, 2009 at 1:22pm1a. There are 5 balls (red and even) out of the 20.

2b. Only the 5 green odd balls should not be chosen out of the 20. What proportion remains?

You have no indication of what you desire on the second draw.

I hope this helps. Thanks for asking.

**Related Questions**

statistics - 1. In a large box are 20 ping-pong balls—10 of them are red and ...

Math - A bag contains a set of ping pong balls numbered from 1 to 12. If you ...

Math--PLEASE HELP!!! - Let's begin with a rather straightforward lottery in ...

physics - Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = ...

physics - Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = ...

Physics - How much kinetic energy does a 1 kg ball have if it has a velocity of ...

physics - Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = ...

Statistics - I have two boxes with balls; box #1 and box #2. Box #1 has 3 red ...

math - A basket contains 15 red numbered balls and 10 white numbered balls. A ...

physics - A 3.0 g ping pong ball is suspended from a thread 35 cm long. When a ...