Probability Day 3

Probability Day 3

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Multiple Choice

Out of those surveyed, what is the probability that the student is a boy who can't bike to school (in simplest form)?

• 4/30

• 7/30

• 2/15

• 14/30

Multiple Choice

Of the mechanical engineers, what is the probability that math is their favorite subject? You can use the calculator on the computer to determine this percentage.

• 1.91

• 52%

• 17%

• 35%

Multiple Choice

A survey of 15-18 year olds asked if they used Twitter, or not. The results are shown in the given table. What is the probability that a person chosen at random is female who does not use Twitter?

• 64/395

• 206/395

• 32/395

• 236/395

Multiple Choice

A class survey asks students of their theatre preferences of comedy or mystery. The results are shown in the given table. Based on this survey, what is the probability of a male from this school choosing mystery?

• 60/105

• 60/95

• 60/188

• 60/83

Multiple Choice

Freshman girls and boys were surveyed to choose their favourite subject from the list of Math, English or Science. The results are shown in the two-way relative frequency table. If a student is chosen at random from this group, what is the probability that the student is a girl who chose math?

• 27%

• 33%

• 39%

• 40%

Multiple Choice

What is the probability of rolling an even number on the first roll of a die and rolling an odd number on the second roll?

Are these events independent or dependent?

• Independent

• Dependent

Multiple Choice

Is the event INDEPENDENT or DEPENDENT?

Amy plays card games. She picks a card at random. Then without putting the first card back, she picks a second card at random.

• Independent

• Dependent

Multiple Choice

Is the event INDEPENDENT or DEPENDENT?
The spinner is spun twice.  What is the probability that it lands on red first and then blue?

• Independent
• Dependent

Multiple Choice

Two marbles are drawn from a container in such a way that the first marble drawn is replaced before selecting the second marble. Does the outcome of the first draw affect the outcome of the second?

• Yes
• No

Multiple Choice

A bag contains some red-colored and some blue-colored marbles. First a red-colored marble is drawn and then, without replacing the first marble, a blue-colored marble is drawn. Are the two events dependent or independent?

• Independent
• Dependent

Multiple Choice

What is the probability of picking a blue marble, putting it back in the bag, then picking a red marble? (leave answer in fraction form in lowest terms)

• 9/49

• 16/49

• 12/42

• 12/49

Multiple Choice

What is the probability of picking a green marble, keeping it, then picking another green marble? (leave answer in fraction form in lowest terms)

• 9/49

• 1/7

• 3/14

• 6/42

Multiple Choice

What is the probability of flipping a coin twice and landing on tails both times? (leave answer in fraction form in lowest terms)

• 1/2

• 2/2

• 4/1

• 1/4

Independent Practice

Khan academy:

-Simple Probability

-Dependent and Independent Events

Remember you need a 75% or better on all khan academy assignments to receive credit! There are only 12 school days left in this semester (including final exams!!)