1) A bag contains 19 balls numbered 1 through 19.

What is the probability of selecting a ball that has an even? number?

2/19

9/19

19/9

9

5 points

QUESTION 2

1. There are 3 balls in a? hat; one with the number 3 on it, one with the number 4 on it, and one with the number 7 on it.

You pick a ball from the hat at random and then you flip a coin. Using a tree diagram? , obtain the sample space for the experiment. List the elements that make up the sample space.

3 H T, 4 H T 7H T

3 4 7 H, 3 4 7 T

3 H, 3 T, 4 H, 4 T, 7 H, 7 T

3 H, 4 H, 7 H

5 points

QUESTION 3

1.

What is the probability of drawing a club or a red card from a deck of 52 cards

.75

.25

.50

None of the above

5 points

QUESTION 4

1. One person is selected at random from a class of 16 males and 15 females. Find the odds against selecting:

a female

15:16

16:15

15:31

16:31

5 points

QUESTION 5

1.

6

1/6

3

1/3

5 points

QUESTION 6

1. A class consists of 24 women and 67 men. If a student is randomly? selected, what is the probability that the student is a ?woman?

1/91

67/91

24/67

24/91

5 points

QUESTION 7

1.

A couple plans to have three children.

Find the probability that the couple has a) no boys b) at least one girl, c) either exactly 2 girls or 2 boys.

a) 1/8 b) 1/8 c) 1/8

a) 1/8 b) 7/8 c) 3/4

a) 1/8 b) 1/2 c ) 3/4

None of the above

5 points

QUESTION 8

1.

Evaluate the expression:   8!

40,320

8

56

None of the above

5 points

QUESTION 9

1.

On the lottery, where one number is chosen, determine the probability that you would win if you have a choice of 46 numbers to choose from

45/46

1/46

1/2

None of the above

5 points

QUESTION 10

1.

Evaluate 8P3.

336

15

56

None of the above

5 points

QUESTION 11

1.

A card is picked from a deck of cards.

Find the odds against and the odds in favor of selecting a heart.

3:1 , 1:3

4:1 , 1:4

1:3 , 3:1

None of the above

5 points

QUESTION 12

1. In a sample of 50,000 first-born babies, 5 were found to have Prader-Willi syndrome.

Find the emperical probability that the family's first child will be born with the syndrome .

1/10000

5/50000

.0001

All of the above

5 points

QUESTION 13

1.

A traffic light is red for 25 seconds, yellow for 5 seconds, and green for 55 seconds.

What is the probability that when you reach the light - the light is yellow?

5/85 + 80/85

5/85 or 1/17

80/85 or 16/17

None of the above

5 points

QUESTION 14

1.

Jim finds an irregularly shaped five-sided rock. He labels each side and tossed the rock 100 times. The results are in the following table.

Side            1     2    3     4      5

Frequency   32    18  15 13     22

Find the emperical probability that the rock will land on side 4 if tossed again.

13/100

4/13

4/100

None of the above

5 points

QUESTION 15

1. A number labeled with numbers 1, 2, 3, 4, 5, and 6 is tossed. What are the odds in favor of the cube showing a number less than 3?

1:2

1:3

1:1

2:1

5 points

QUESTION 16

1.

3/4

4/5

5/4

1/4

5 points

QUESTION 17

1.

Evaluate 10C3.

360

120

720

none of the above

5 points

QUESTION 18

1. A contractor is considering a sale that promises a profit of $40,000 with a probability of 0.7 or a loss of $5,000 with a probability of 0.3. What is the expected profit?

$31,500

$28,000

$26,500

$35,000

5 points

QUESTION 19

1.

In July in Seattle, the grass grows 1/2 inch a day on a sunny day and 1/4 inch a day on a cloudy day. In Seattle, in July, 75% of the days are sunny and 25% of the days are cloudy.

a) Find the expected value of grass growth for the day b) Find the expected value of grass growth for the month of July ( 31 days ) -- round both to 2 decimal placees

a) .50 in b) 15.5 in

a) .75 in b) 23.23 in

a) .44 in b) 13.64 in

None of the above

5 points

QUESTION 20

1. One digit from the number 5, 494, 224 is written on each of seven cards. What is the probability of drawing a card that shows 5 or 2?

5/7

4/7

3/7

2/7

5 points

pur-new-sol

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