Question

What is the experimental probability of the spinner landing on red?

a. 1/2 b. 1/3 c. 1/4 *** What is the experimental probability of the spinner landing on blue?
a. 2/7 b. 1/4 *** c. 2/9 There’s a spinner with 8 sections in total with different colors. 2 red, 2 green, 2 yellow, and 2 blue.
Which of the following situations could be modeled by flipping a coin?
a. randomly picking one of four students to be a group leader
b. randomly guessing the answers on a true/false test ***
c. randomly selecting a prize from a bag containing six different prizes

Answer 1

There’s a spinner with 8 sections in total with different colors. 2 red, 2 green, 2 yellow, and 2 blue.

To find the probability of the spinner landing on any color, simply take
(number of color)/(total)

To find the probability of landing on red, there are 2 reds, and 8 total. So,
2/8 = 1/4

To find the probability of landing on blue, there are 2 blues, and 8 total. So, 2/8 = 1/4. The same as before.


Flipping a coin gives a 50/50 or equal chance between two events. We should pick the answer that has only two events. That would be a true/false test since there are only two choices in this situation.