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The probability that you randomly select a red marble from a group of 40 marbles is 7/20 . How many are red marbles?

The probability that you randomly select a red marble from a group of 40 marbles is 7/20 . How many are red marbles?
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2 votes
The probability that you randomly select a red marble from a group of 40 marbles is 7/20 . How many are red marbles?

User Fmucar
by
7.2k points

2 Answers

4 votes
14 i think. Since 7/20 is 35%, it’s 40-65%(100%-35%) and so it is 14 red marbles.
User ZILONG PAN
by
8.5k points
7 votes
There are 14 red marbles
User Kenenbek Arzymatov
by
8.7k points
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