Wednesday

July 23, 2014

July 23, 2014

Posted by **Melissa** on Sunday, July 31, 2011 at 9:40am.

· a prime number under 10 given the card is a heart. (1 is not prime.)

· a diamond or heart given the card is red.

· a King, given that the card is not a spade.

Show step by step work. Give all solutions exactly in reduced fraction form

- math -
**Reiny**, Sunday, July 31, 2011 at 11:18amconditional probability:

P(A|B) read: prob of A, given B

= P(A∩B)/P(B)

let A be all primes under 10

B is all hearts

so A∩B is 2H, 2H, 5H, 7H, there are 4 of those

prob(prime under 10 | red) = (4/52)/(1/4) = 4/13

Here is a page with a nice explanation and examples of conditional probability.

(Broken Link Removed)

**Related Questions**

College Math - A card is selected from a standard deck of 52 playing cards. A ...

Math - A card is selected from a standard deck of 52 playing cards. A standard ...

Math - One card is selected from a deck of playing cards. Determine the ...

Math - A card is selected from a standard deck of 52 playing cards. A standard ...

geometry - A card is selected from a standard deck of 52 playing cards. A ...

Math - One card is selected from a deck of playing cards. Determine the ...

Math-New Question - One card is selected from a deck of playing cards. Determine...

math - One card is selected from a deck of cards. Find the probability of ...

math - One card is selected from a deck of cards. Find the probability of ...

probability - consider the experiment of selecting a card from an ordinary deck ...