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anonymous
 4 years ago
2 Selected from the group at random but assume there are 5 males and 7 females.
1.) what is the probability that 2 females are selected?___________________
2)What is the probability that 2 males are selected?_______________________
anonymous
 4 years ago
2 Selected from the group at random but assume there are 5 males and 7 females. 1.) what is the probability that 2 females are selected?___________________ 2)What is the probability that 2 males are selected?_______________________

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.01.\( \huge \frac{\binom{7}{2} }{\binom{12}{2}}\)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.02.\( \huge \frac{\binom{5}{2} }{\binom{12}{2}} \)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0do i multiply 7 by 2 and 12 by 2? for the 1st step

Directrix
 4 years ago
Best ResponseYou've already chosen the best response.1Of the 7 females, we select 2 and of the 5 males we select 0. C(7,2) times C(5,0) =21. Of the 12 people, there are 66 possible random selections of 2. Probability is the number of desirable outcomes (2 females) divided by the number of possible outcomes (66 groups of 2). P(2 F) = 21/ 66 = 7/22 ==> ANS Check this, CW.

Directrix
 4 years ago
Best ResponseYou've already chosen the best response.1)What is the probability that 2 males are selected. Of the 7 females, we select 0. Of the 5 males, we select 2 for our twoperson group. C(7,0) times C(5,2) = 10 groups of 2males There are C(12,2) possible groups of 2 or 66 two person groups of any gender. P(2M) = 10/66 = 5/33 ==> ANS

Directrix
 4 years ago
Best ResponseYou've already chosen the best response.1Check these, CW, and see if they are correct.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0it is good for the second not the first

Directrix
 4 years ago
Best ResponseYou've already chosen the best response.1I was looking at the 3dice problem. I'll look at this now.

Directrix
 4 years ago
Best ResponseYou've already chosen the best response.1Do you have P(2 F) = 21/ 66 for part (a) about the two females?
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