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Digiron [165]
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?

Mathematics
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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