Kelly had 20 minutes to do a three-problem quiz. she spent 11 9/10 minutes on question a and 4 3/5 minutes on question b. how much time did she have left for question c?

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asked Dec 9, 2023 73.7k views

1 Answer

Harikrishnan Ck · Answer 1 · 2023-12-15T02:22:30+0000

Kelly had 3.5 minutes left for question c.

To find the time Kelly had left for question c, we need to subtract the time she spent on question a and question b from the total time she had.

First, let's convert the mixed numbers to improper fractions:

11 9/10 = 119/10

4 3/5 = 23/5

Next, let's add the time she spent on each question:

(119/10) + (23/5) = (119/10) + (46/10) = 165/10 = 16 1/2 minutes

Finally, subtract the time from the total time she had:

20 minutes - 16 1/2 minutes = 20 minutes - 16.5 minutes = 3.5 minutes

Therefore, Kelly had 3.5 minutes left for question c.