7th review part 2 Probability models Compound events

7th review part 2 Probability models Compound events

Multiple Choice

The cafeteria is serving three kinds of sandwiches:  tuna (T), chicken, (C), and peanut butter (P).  They are also serving a choice of two drinks:  milk (M) or water (W).  Which is the complete set of possibilities of combinations?

• TW, CW, PW
• TW, TM, TW, CW, PW
• TW, TM, CW, CM, PW, PM

Multiple Choice

• 7/24
• 1/2
• 1/24
• 1/12

Multiple Choice

• 1/2
• 1/8
• 1/3
• 1/12

Multiple Choice

• 1/4
• 1/8
• 1/2
• 1/6

Multiple Choice

• 3/4
• 1/2
• 1/8
• 1/16

Multiple Choice

Express your answer rounded to the nearest percent.

• 2%
• 3%
• 4%
• 5%

Multiple Choice

The answer is graphed with an *.

• 0  * |  |  |  |  |  |  .5
• 0  |  *  |  |  |  |  | .5
• 0  |  |  *  |  |  |  | .5
• 0  |  |  |  *  |  |  | .5

Multiple Choice

• Sue because 8/30 > 6/25
• Eric because 6/25 > 8/30
• Neither because they have the same probability.
• Eric because 27% > 24%

Multiple Choice

Express your answer as a fraction in simplest form.

• 20/182
• 10/20
• 5/49
• 10/91

Multiple Choice

Express your answer as a fraction in simplest form.

• 3/64
• 1/16
• 1/64
• 1/4

Multiple Choice

Each week, Mrs. Stafford picks a runner from her homeroom to run errands. In order to remain unbiased in her selection, she flips a coin to determine if the runner will be a boy or a girl. She assigns heads to girls and tails to boys. Based on this procedure, what is the probability of selecting a boy?

• $\frac{1}{4}$

• $\frac{1}{2}$

• $\frac{1}{3}$

• $\frac{1}{8}$

Multiple Choice

• $\frac{1}{8}$

• $\frac{1}{4}$

• $\frac{1}{2}$

• $\frac{1}{3}$

Multiple Choice

From a pack of 52 cards, two cards are drawn without replacement. What is the probability of both the cards being kings?

• 1/2
• 57/89
• 1/221

Multiple Choice

In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:

• 20/29
• 18/18
• 7/46
• 21/138

Multiple Choice

Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even?

• 3/4
• 8/19
• 7/8

Multiple Choice

What is the probability of getting a sum 9 from two throws of a number cube?

• 1/9
• 2/3
• 3/5

Multiple Choice

In a box, there are 8 red, 7 pink, and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?

• 1/3
• 7/19
• 3/4

Multiple Choice

A bag contains 2 red, 3 green and 2 purple balls. Two balls are drawn at random, one at a time without replacement. What is the probability that neither of the balls drawn is purple?

• 5/7
• 10/21
• 2/7

Multiple Choice

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?

• 9/20
• 1/2
• 8/15