Question

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. Kevin spins the spinner 180 times. Kevin determines about how many times the spinner will land on red or green, and his work is shown below.

What mistake did Kevin make, if any?
Kevin has the formula reversed; it should be the total number of sections over the number of red or green sections.
Kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections.
Kevin should multiply by the number of sections in the spinner rather than the total number of spins.
Kevin calculated the prediction correctly and did not make any mistakes.

Answer 1

Answer: 2nd answer

Explanation:

Kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections.

Answer 2

The mistake that kevin make is:

• Kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections.

Explanation:

It was given that there are 10 sections in the spinners 2 of each color.

Hence, in order to find the probability that the spinner lands on green or red is:

He need to find the total sections which are red or green,.

There are 4 sections which are red or green

( Since 2 are green and 2 are red)

and the probability that it will land on green or red is:

`=(4)/(10)* 180\\\\\\=72`

Hence, she should have taken 4 in the numerator to calculate the probability.