An apartment building has 20 two-bedroom apartments and 8 three-bedroom apartments. If 4 apartments are chosen at random to be redecorated, what are the probabilities that

MAT135 Introduction to Statistics and Data Analysis

Module 6 TEST  

Test #4

Name _______________________________

1.  An apartment building has 20 two-bedroom apartments and 8 three-bedroom apartments.  If 4 apartments are chosen at random to be redecorated, what are the probabilities that

 a)           All will be two-bedroom apartments ?

(b)  2 will be two-bedroom apartments and 2 will be  three-bedroom apartments ?

2.  A bowl contains 33 red beads, 11 white beads, 9 blue beads, and 15 black beads.  If one bead is drawn at random, what are the probabilities of getting

                (a)  a red bead

                (b)  a bead that is white or black

 C)           a bead that is neither red nor black

3.  A carton of 18 lightbulbs includes 5 that are defective.  If two bulbs are drawn at random, what are the probabilities that

                (a)  neither bulb will be defective

                (b)  exactly 1 bulb will be defective

                (c )  both bulbs will be defective

4.  If three cards are drawn from  a well-shuffled deck of 52 playing cards, what are the probabilities of getting

 a)           three diamonds

(b)  an Ace, a Queen, and a King