Homework Help: Math

Posted by Sally on Wednesday, May 5, 2010 at 10:38pm.

I have a bag of tiles 0-9. Without looking select a tile, record, return tile, select a second tile. What is the probability that exactly one tile will be a prime number?

Math - Reiny, Thursday, May 6, 2010 at 7:05am
You will have 2 choices
PN -- N for not prime
NP

prob = (4/9)(5/9) + (5/9)(4/9) = 40/81
Math - Reiny, Thursday, May 6, 2010 at 8:00am
looks like I forgot how to count, there are 10 tiles not 9

so
prob = (4/10)(6/10) + (6/10)(4/10) = 48/100 = 12/25

Answer this Question

Related Questions

Math - Teresa put tiles marked with the letters of her name into a bag. The back...
math - This is a question about compound events: The game of Scrabble includes ...
Math - Tile Pattern... A design starts with 1 tile and it continues to grow the ...
Algebra - Jim is installing ceramic tile behind his kitchen sink. Each tile is a...
Geometry - A certain type of tile costs $50 per square meter. If the actual ...
math - ben wants to decorate his bedroom wall with colored square tiles of the ...
Algebra - Suppose your tile company spends $ 195 each month, regardless of how ...
Math - room size i s 10ft x 15ft. i want to put tile down and the tile size is 3...
Geometry - One hundred tiles of a certain size are needed to pave a floor. If a ...
math - Emma is installing a new tile floor. Each tile measures 12 inches by 12 ...

For Further Reading

First Name:
School Subject:
Answer: