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3 years ago

8

A bag is filled with marbles. You take out and mark 80 marbles. Then you put the marbles back in the bag and mix the marbles. In

a sample of 20 marbles, 4 of the marbles are marked. About how many marbles are in the bag?

2 answers:

evablogger [386]3 years ago

7 0

There are about 400 marbles

noname [10]3 years ago

3 0

About 400 marbles. You simply set up a proportion and solve it as I did in the photo attached.

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How do you subtract the following fraction to find the solution?<br> 5 - 4/9

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