Question

10 POINTS!!!

Noam chose 3 songs from a pile of 20 songs to play at a piano recital. What is the probability that she chose The Entertainer, Something Doing, and The Ragtime Dance? (JUSTIFY)

show your work, and if it is "favorable outcome" formula. please answer.

Answer 1

pr=no:of favourable outcomes/no:of possible outcomes

no:of favourable outcomes=1

no:of possible outcomes=

`c^{20_(3) =20/3(20-3)=\\17*18*19*20/2*3*17=\\18*19*20/6\\=3*19*20\\=1140\\therefore,\\pr=1/1140`