Question

Which of these is an example of typing at an average rate of 42 words per minute?

A) Typing 28 words in 2/3 of a minute
B) Typing 16 words in 3/2 of a minute
C) Typing 16 words in 2/3 of a minute
D) Typing 28 words in 3/2 of a minute

Answer 1

The example of typing at an average rate of 42 words per minute is Option A: Typing 28 words in 2/3 of a minute. The calculation shows that this option results in exactly 42 words per minute, matching the given rate.

Step-by-step explanation:

To determine which of these is an example of typing at an average rate of 42 words per minute, we need to calculate the number of words typed per minute in each option.

1. Option A: Typing 28 words in 2/3 of a minute. To find the rate, divide the number of words by the time in minutes: 28 ÷ (2/3) = 28 × (3/2) = 42 words per minute.
2. Option B: Typing 16 words in 3/2 of a minute. This would be 16 ÷ (3/2) = 16 × (2/3) = 10.67 words per minute, which is lower than 42.
3. Option C: Typing 16 words in 2/3 of a minute. Here, the rate is 16 ÷ (2/3) = 16 × (3/2) = 24 words per minute, also lower than 42.
4. Option D: Typing 28 words in 3/2 of a minute. The rate would be 28 ÷ (3/2) = 28 × (2/3) = 18.67 words per minute, once again lower than 42.

The correct answer is Option A, because it matches the average rate of 42 words per minute.