2720636 muneys :3
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Answer:
2nd
Step-by-step explanation:
Just Try 84 Bro..............
In this question,We have to group the given expression to get 5 as the final answer .

Here we put 5 +20 in parenthesis, that is

And we do the required operations, that is

And we get 5.
C. For every decrease of one chore completed, one hour was spent on the internet.