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borishaifa [10]
2 years ago
11

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

Mathematics
2 answers:
Vladimir79 [104]2 years ago
7 0
14 i think. Since 7/20 is 35%, it’s 40-65%(100%-35%) and so it is 14 red marbles.
Masteriza [31]2 years ago
5 0
There are 14 red marbles
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3 years ago
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Lady bird [3.3K]

Answer:

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Well, we are given three days. The first day has a rate of 13% winning. The second day has a rate of 13% as well. And the third day has a rate of 11%. You can find this simply by dividing the amount of winners by amount of participants. Now, we must find the mean, or average, of these statistics. We will get 12% as the average rate of winners. How did we get this? By simply adding all three (13+13+11) then dividing by three (37/3), which gives us 12% if we round to a whole number. Now, we can take this number and get 12% of 750. How do we do this? Well, 12% is equal to 0.12. So we will multiply 0.12 by 750. This will give us 90. And there you have your answer.

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7 0
3 years ago
Examine the system of equations.
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answer:

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explanation:

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3 years ago
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