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In a class, 3/5 of the students are girls and rest are boys. If 2/9 of the girls and 1/4 of the boys are absent. What part of the total number of students are present?
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23 30 -
23 36 -
18 49
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17 25
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Correct Option: A
Let the total number of students in a class be n.
∴ According to question,
| Number of girls = | n | |
| 5 |
| and number of boys = n − | |
| 5 |
| = | n | |
| 5 |
| Number of girls who are absent = | × | n = | ||||
| 5 | 3 | 45 |
| and number of boys who are absent = | × | × n = | ||||
| 5 | 4 | 10 |
∴ Total number of students who are present
| = n − | − | ||
| 45 | 10 |
| = | |
| 90 |
| = | = | ||
| 90 | 30 |
Therefore, the 23/30 part of the students are present in the class.
