Question

please do a-d

Homework: L Conditional Probability, Independence Save Score: 0.29 of 2 pts 9 of 13 (13 complete) HW Score: 59.68 % , 8.95 of 15 pts 5.4.27 Question Help Suppose you just purchased a digital music player and have put 14 tracks on it. After listening to them you decide that you like 3 of the songs. With the random feature on your player, each of the 14 songs is played once in random order. Find the probability that among the first two songs played (a) You like both of them. Would this be unusual? (b) You like neither of them. (c) You like exactly one of them. (d) Redo (a)-(c) if a song can be replayed before all 14 songs are played (a) The probablility that you like both songs is (Round to three decimal places as needed.) Enter your answer in the answer box and then click Check Answer Check Answer Clear All TH parts remaining questis.doc questis (1).doc doc

Answer 1

total songs = 14

a) prob of you like both of songs = = 0.034

2 3 13 14

which is not usual practically

b)prob of you like neither of them =   = 0.011

2 1 14 13

c) prob of you like exactly one of them = 1 - prob of you like both of songs - prob of you like neither of them

= 1 - 0.034 -0.011 = 0.955

d)  if a song can be replayed before all 14 songs are played.

again a = 3/14*3/14 = 0.046

b = 2/14*2/14 = 0.020

c = 1 - 0.046 - 0.020 = 0.934