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Find the number of ways to listen to 4 different CDs from a selection of 10 CDs.
 one year ago
 one year ago
Find the number of ways to listen to 4 different CDs from a selection of 10 CDs.
 one year ago
 one year ago

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seigaBest ResponseYou've already chosen the best response.1
There are 15 x 14 x 13 x 12 ways to listen to 4 different CDs out of 15.
 one year ago

satellite73Best ResponseYou've already chosen the best response.0
i am wrong, @seiga is right
 one year ago

anthony~Best ResponseYou've already chosen the best response.0
theres are the answer choices: 151,200 5040 2880 720
 one year ago

seigaBest ResponseYou've already chosen the best response.1
151,200 5040 2880 720 solution: in this case the original answer should be ¹⁰C₄ = (10x9x8x7) / (1x2x3x4) = 210 but from options it is clear that it is used ¹⁰P₄ = 10x9x8x7 = 5040 in the question paper i m still sure that since it is not mentioned track wise or not. so it must be ¹⁰C₄ or 210 as answer. hope it would be helpful
 one year ago
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