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DaniilM [7]
3 years ago
13

There are 1200 students at a school and 390 of them are boys if each classroom holds 30 students how many classrooms are needed

at the school
Mathematics
1 answer:
vodomira [7]3 years ago
5 0

Answer:

40 classrooms

Step-by-step explanation:

Divide 1200 by 30.

1200÷30=40

If 390 students are boys just subtract 390 from 1200.

1200-390= 810

There must be 810 girls if there are 390 boys

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3 years ago
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8 0
4 years ago
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Juli2301 [7.4K]
<h3>Answers:</h3>

The probability of not drawing a red marble is   7/10

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=======================================================

Explanation:

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The probability of not selecting a red marble is 7/10 because 3/10+7/10 = 1. Put another way, we have 7 marbles that aren't red (the 5 blue and 2 black ones) out of 10 total.

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