IXL | Use collected data to find probabilities and make predictions

In her geology class, Nora learned that quartz is found naturally in a variety of colors. Nora's teacher has a giant box of colorful quartz pieces that he and his students have collected over the years. Nora picks a piece of quartz out of the box, records the color, and places it back in the box. She does this 18 times and gets 3 purple, 2 yellow, 5 white, and 8 pink quartz pieces.

Based on the data, what is the probability that the next piece of quartz Nora picks will be yellow?

Write your answer as a fraction or whole number.

ref_doc_title.

Learn with an example

question

Danielle makes fluffy stuffed animals to give to local charities. She has a container of 500 googly eyes in different sizes that she sews onto the animals. She randomly selects 28 googly eyes from the container and gets 12 small, 9 medium, and 7 large eyes.

Based on the data, what is the probability that the next googly eye Danielle selects will be large?

Write your answer as a fraction or whole number.

solution

Use the data to determine the probability that the next googly eye Danielle selects will be large.

Danielle selects 28 googly eyes from the container.
7 of these are large googly eyes.

Based on the data, the probability that the next googly eye Danielle selects will be large is

which simplifies to

Looking for more? Try these:

Lesson: Probability

$Confetti$

Excellent!

Now entering the Challenge Zone—are you ready?

Teacher tools

Work it out

Not feeling ready yet? These can help:

II.5Experimental probability

Lesson: Probability

Excellent! You got that right!

Jumping to level 1 of 1

Excellent!