Math 7 Review Part 5

The probability of an event is 84%.

Describe the likelihood of the event.

• Likely

• Unlikely

You randomly draw a marble from a bag, record its color, and then replace it.

You draw a red marble 7 out of 25 times.

What is the experimental probability that the next marble will be red?

Which one doesn't apply?

• 3/25

• 7/25

• .28

• 28%

3. There are 4 green marbles and 7 silver marbles in a bag.

4. You randomly choose one of the marbles.

5. What is the probability of choosing a green marble?

6. Choose all that apply!

• 4/11

• 7/11

• 36.4%

A bag contains lettered tiles.

5. The theoretical probability of choosing a vowel is 30%.

6. The bag contains 63 consonants.

7. How many tiles are in the bag?

9. P(event)=Number of favorable outcomes

10. Number of possible outcomes

• 90 tiles

• 30 tiles

• 63 tiles

Each turn in a game, you randomly draw a card from a deck and replace it.

The table shows the number of times you draw each type of card.

How many times can you expect to not draw a point card in 25 turns?

• 10 times

• 30 times

• 20 times

. You choose between red or yellow wallpaper, and orange, red, green, blue, or purple carpet.

Find the total number of possible outcomes when you select one color of wallpaper and one color of carpet.

• 10

• 20

• 30

You roll a six-sided number cube and flip a coin.

What is the probability of rolling a number less than 2 and flipping heads?

• 12%

• 1/12

• 8.3%

A couple plans to have 4 children.

The gender of each child is equally likely.

Design a simulation involving 90 trials that you can use to model the genders of the children.

***Create simulation on your white board!

Let heads represent a male

Let tails represent a female

Run 90 trials

• Completed simulation on whiteboard with 90 trials, flipping a coin 4 times for each trial to determine the gender of each child.
• Used a dice to determine the gender of each child in the simulation.
• Completed simulation on whiteboard with 50 trials, flipping a coin 2 times for each trial to determine the gender of each child.

You can choose from 4 kinds of wrapping paper, 5 gift bags, 5 colors of ribbon, 3 bows, and 4 stickers.

You choose either a style of wrapping paper or a gift bag.

Then you choose one of each of the remaining items.

Find the total number of ways you can wrap the gift.

• 540

• 520

• 320

*You flip a coin, spin the spinner, and flip a coin again.

Find the probability of flipping heads, spinning an odd number, and then flipping tails.

• 3/10

• .15

• 12%