Marco designs a spinner wheel that has exactly 4 sections: red, blue, green, and yellow. He wants the spinner wheel to have a 25% chance of landing on each section. He spins the wheel 500 times. The results of the spins are shown in this table.
| Spinner wheel section | Number of times the spinner lands in each section |
|---|---|
| Red | 80 |
| Blue | 165 |
| Green | 130 |
| Yellow | 125 |
Based on the results in this table, one of the following changes would be the best fix. Which one?
A. Incorrect. Marco wants the spinner wheel to have a chance of landing on each section. For spins, this means the spinner should land on each section approximately times. Be careful when reading values from the table. You may have switched the numbers for the red and blue sections.
B. Correct. Marco wants the spinner wheel to have a chance of landing on each section. For spins, this means the spinner should land on each section approximately times. The number of times the spinner landed on the green section and the yellow section are both close to this number already, but the number of times the spinner landed on the red section is too small and the number of times the spinner landed on the blue section is too large. Therefore, Marco should increase the area of the red section by decreasing the area of the blue section.
C. Incorrect. You may have correctly noticed that the number of times that the spinner lands in the red section is less than the number of times it lands in green, yellow, or blue, so the red area needs to be increased. However, it does matter which area gets decreased because the number of times the spinner lands on yellow and green areas are already close to the desired value of of spins, or .
D. Incorrect. You may have correctly noticed that the number of times that the spinner lands in the blue section is greater than the number of times it lands in green, yellow, or red, so the blue area needs to be decreased. However, it does matter which area gets increased because the number of times the spinner lands on yellow and green areas are already close to the desired value of of spins, or .
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