SOLUTION: Evaluate C 15 9 Answers to this question would be much obliged..the 15 is supposed to be on left side of the C,sorry.

Question 136121: Evaluate

C
15 9
Answers to this question would be much obliged..the 15 is supposed to be on left side of the C,sorry.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
The number of combinations of 15 things taken 9 at a time is given by

Note that 15! = 15 * 14 * 13 * 12 * 11 * 10 * 9!, and 15 - 9 = 6, so:

(4 * 3 = 12, so eliminate 4 and 3 in the denominator and 12 in the numerator)

(6 is 2*3, 3*5 is 15 eliminating that factor, leaving a 2 and a 2 in the denominator, 2 into 14 is 7 and 2 into 10 is 5)

Or you can do it the hard way:

RELATED QUESTIONS
Show that the area of an equilateral triangle of side 2x is x^2square3, given that tan 60 (answered by nerdybill)

Ooops. I just asked one question and was looking at the other problem. Sorry. Here... (answered by longjonsilver)

Tell wether the angles are complementary,supplementary,or neither. m /_1 = 53 /_ =... (answered by solver91311)

Tell wether the angles are complementary,supplementary,or neither. m/_3=82 m/_4=98 (answered by solver91311)

Tell wether the angles are complementary,supplementary,or neither. m /_1 = 53 m /_2 = (answered by solver91311)

Tell wether the angles are complementary,supplementary,or neither. m/_5=7 m/_6=83... (answered by solver91311)

Alright, I know only one Question, but I only need you to double check these for me. I... (answered by Alan3354)

If m = 5 + 2i what is (a) the equation of... (answered by Fombitz)

Ok so: There are 15 questions on a multiple-choice exam and five possible answers to each (answered by richwmiller)