Question

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

Answer 1

A is seven and B is 7 combination 3 times 3 for each republican

Answer 2

7C3 times 3C1 for the second one.

Answer 3

which is what math major said

Answer 4

which is the same thing as what i put but i was lazy :P

Answer 5

:)

Answer 6

when that other kid put up something else i was doubting my answer lolz

Answer 7

lol. turns out he doubted his answer more than you :D

Answer 8

i like doing math help at 2 am is that odd

Answer 9

heh, you on the east coast?

Answer 10

trust me i'm up till 5 am helping these kids sometimes :)

Answer 11

yeah im on the east coast and im going to major in math in the fall so i wanna stay sharp

Answer 12

lol, not sure this is the best way to stay sharp :)

Answer 13

what would you suggest

Answer 14

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?

Answer 15

undergrad im only 17 atm