The student is not correct. The ratio for the number of purple buttons to green buttons is not 3:4. According to the problem, there are 4 purple buttons and 3 green buttons, so the correct ratio would be 4:3.
The student may have made an error by mistakenly swapping the numbers in the ratio.
1 answer
Alternatively, the student may have misunderstood the problem and incorrectly interpreted the ratio. It is important for the student to carefully read and comprehend the problem before determining the correct ratio.