# statistics help free online

republican democrat independent
male 46 39 1
female 5 9 0

1. randomly select one senator, what is the probability of getting a republican, given that a male was selected?

2. randomly select one senator, what is the probability of getting a male, given that a republican was selected?

3. randomly select 1 senator, wht is the probability of getting a female, given that an independent was selected?

4. randomly select 1 senator, what is the probability of getting a democrat or independent, given that a male was selected?

5. randomly select 2 senators, what is the probability of getting a democrat female and a republican male?

 Curlyben Posts: 18,081, Reputation: 8728 Admin & Wine Expert #2 Jul 31, 2012, 04:34 AM
So what do YOU think ?
 ccny_miah Posts: 15, Reputation: 1 New Member #3 Jul 31, 2012, 04:42 AM
1. 46/86?
 ccny_miah Posts: 15, Reputation: 1 New Member #4 Jul 31, 2012, 05:13 AM
Quote:
 Originally Posted by Curlyben So what do YOU think ?
is it correct?
 ebaines Posts: 10,046, Reputation: 5534 Expert #5 Jul 31, 2012, 05:47 AM
Quote:
 Originally Posted by ccny_miah 1. 46/86?
Correct - there are 46 republicans out of 86 males. Of course you can simplify that fraction.

What answers did you come up with for the other questions?
 ccny_miah Posts: 15, Reputation: 1 New Member #6 Jul 31, 2012, 05:57 AM
2. 46/86?
 ebaines Posts: 10,046, Reputation: 5534 Expert #7 Jul 31, 2012, 06:01 AM
Quote:
 Originally Posted by ccny_miah 2. 46/86?
Correct numerator. But the denominator should be equal to the total number of republicans - what number is that?
 ccny_miah Posts: 15, Reputation: 1 New Member #8 Jul 31, 2012, 06:27 AM
Quote:
 Originally Posted by ebaines Correct numerator. But the denominator should be equal to the total number of republicans - what number is that?
i meant, 46/51.
 ccny_miah Posts: 15, Reputation: 1 New Member #9 Jul 31, 2012, 06:32 AM
3. 0/1?
 ebaines Posts: 10,046, Reputation: 5534 Expert #10 Jul 31, 2012, 08:25 AM
Yes - answers for 2 and 3 are both correct. It seems you have the technique down nicely. Looking forward to seeing what you get for number 5.