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2 years ago

In a class, 60% of the students are boys and the rest are girls. If the number of boys is 30, how many students are there?

Mathematics

1 answer:

irga5000 [103]2 years ago

5 0

50 total students

20 girls

Explanation:

total students: 100%

----------------

60% → 30

1% → 30/60

1% → 0.5

100% → (0.5 * 100)

100% → 50

number of girls:

total students - number of boys

50 - 30

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Answer:

Catron's error is

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Step-by-step explanation:

Catron evaluates the expression (negative 9) (2 and two-fifths)

That expression can be written as below

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Catron's error is

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The corrected steps are

Step1: Given expression is $(-9)(2\frac{2}{5})$

Step2: Convert mixed fraction into improper fraction

$(-9)(2\frac{2}{5})=(-9)(\frac{12}{5})$

Step3: Multiplying the terms

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In a class, 60% of the students are boys and the rest are girls. If the number of boys is 30, how many students are there? ​

In a class, 60% of the students are boys and the rest are girls. If the number of boys is 30, how many students are there?