out of a class of 45 students, five were absent,30% of the remaining had failed to do homework. find the number of students who did the homework?? plz armys & guys help me ❤️
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out of a class of 45 students, five were absent,30% of the remaining had failed to do homework. find the number of students who did the homework?? plz armys & guys help me ❤️
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Step-by-step explanation:
Given:-
• Total number of students in the class = 45
• Number of absent Students = 5
Now, number of present student = (45-5) = 40
→ 30% of present students haven't completed their homework.
Percentage of those students who are present and have completed their homework also = (Total Percentage - Percentage of those who haven't completed their homework)
→ (100% - 30%) = 70%
Number of present students who have completed their homework also = (70% of 40)
→ (70/100) × 40
→ (7/10) × 40
→ 7 × 4 = 28
Therefore, there were 28 students who were present and have completed their homework also.