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atroni [7]
3 years ago
10

When a class took a math test, 15% of the class failed, 25% made some mistakes (but didn’t fail), and 24 students got perfect sc

ores. How many students were in the class?
Mathematics
2 answers:
mart [117]3 years ago
5 0

Answer:

There are 40 students in the class.

Step-by-step explanation:

We are given the following in the question:

Percentage of class that failed = 15%

Percentage of class that made mistakes but did not fail = 25%

Number of students that got perfect score = 24

Percentage of students that got perfect score =

100\%-\text{Percentage of class that failed}-\text{Percentage of class that made mistakes but did not fail}\\= 100\%-15\%-25\%\\= 60\%

Let x be the total number of students in the class.

Then, we can write:

60\% \text{ of } x = 24\\60\% \times x = 24\\\\\displaystyle\frac{60}{100}\times x = 24\\\\x = 24\times \frac{100}{60}\\\\x = 40

Thus, there are 40 students in the class.

zvonat [6]3 years ago
4 0

Answer:

40

Step-by-step explanation:

i did it before

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