Question

1) A fan of country music plans to make a custom CD with 11 of her 30 favorite songs. How many different combinations of 11

songs are? possible? Is it practical to make a different CD for each possible? combination?

A) How many different combinations of 11 songs are possible?

b) Is it possible to make a different CD for each possible combination?

2) you toss a coin and randomly select a number from 0-9. What is the probability of getting tails and selecting a 7?

a) 0.05

b) 0

c)0.95

D)0.25

Answer 1

Question 1:

a) Number of different combinations of songs possible here is computed as:

= Number of ways to select 11 songs from the 30 songs

b) It is not really practical to make a different CD for different possibility as there are too many ways that the 11 songs could be selected.

Question 2:

Probability of getting tails and selecting a 7

= Probability of getting tails * Probability of selecting a 7

= 0.5*(0.1)

= 0.05

Therefore a) is the correct answer here.