A committee of four congressmen will be selected from a group of 7 democrats and 3 republicans. Find the number of different committees containing.
A).Exactly one democrat
B).Exactly three democrats
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OpenStudy (anonymous):
A is seven and B is 7 combination 3 times 3 for each republican
OpenStudy (anonymous):
7C3 times 3C1 for the second one.
OpenStudy (anonymous):
which is what math major said
OpenStudy (anonymous):
which is the same thing as what i put but i was lazy :P
OpenStudy (anonymous):
:)
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OpenStudy (anonymous):
when that other kid put up something else i was doubting my answer lolz
OpenStudy (anonymous):
lol. turns out he doubted his answer more than you :D
OpenStudy (anonymous):
i like doing math help at 2 am is that odd
OpenStudy (anonymous):
heh, you on the east coast?
OpenStudy (anonymous):
trust me i'm up till 5 am helping these kids sometimes :)
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OpenStudy (anonymous):
yeah im on the east coast and im going to major in math in the fall so i wanna stay sharp
OpenStudy (anonymous):
lol, not sure this is the best way to stay sharp :)
OpenStudy (anonymous):
what would you suggest
OpenStudy (anonymous):
im just saying, most questions here are like x+4 = 0
find x and that sort of thing. not sure those will help you much is all im saying.
you doing undergrad or grad?