a spinner has 12 sections of equal area. the probability of spinning red is 1/3 and the probability of spinning red or yellow is 3/4. the numbers of yellow section is
4
Let x be the number of yellow sections on the spinner.
Since the probability of spinning red is 1/3, there are 4 red sections on the spinner (12 total sections / 3 = 4 red sections).
Since the probability of spinning red or yellow is 3/4, there are 9 red or yellow sections on the spinner (12 total sections * 3/4 = 9 red or yellow sections).
Therefore, the number of yellow sections on the spinner is 9 total red or yellow sections - 4 red sections = 5 yellow sections.
So, the number of yellow sections on the spinner is 5.