Answer:
106
Step-by-step explanation;
For the "Less than 30 years old" age group:
- Out of the total 183 runners, 106 chose a donut, and 77 chose a banana.
For the "At least 30 years old" age group:
- Out of the total 183 runners, 72 chose a donut, and 57 chose a banana.
- Among the runners who were less than 30 years old, 58% (106 out of 183) chose a donut, and 42% (77 out of 183) chose a banana.
- Among the runners who were at least 30 years old, 56% (72 out of 129) chose a donut, and 44% (57 out of 129) chose a banana.
