A tutor teaches 5 students per hour. With hybrid classes, she can teach 8 per hour virtually. How many hours needed to teach 64 students, 32 in-person and 32 online?
Correct answer: A. 8
- A. 8
- B. 9
- C. 10
- D. 11
Explanation
To solve this problem, calculate the time needed for each teaching method separately. For in-person classes, teaching 32 students at 5 students per hour takes 32/5 = 6.4 hours, which is rounded up to 7 hours since partial hours are not possible. For virtual classes, teaching 32 students at 8 students per hour takes 32/8 = 4 hours. Since both teaching formats operate simultaneously, the total time required is dictated by the longer duration, which is 7 hours. Thus, 8 hours is incorrect and too high, while options like 9, 10, or 11 hours exceed the necessary time calculated.
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