1. A school has 10 classes with the same number of students in each class. One day, the weather was bad and many students were absent. Half ( ½ ) of the students were present in 2 classes, ¾ of the students were present in 4 classes and ¼ of the students were present 4 classes. A total of 60 students were absent. Find the number of students present and also the total number of students of the school.
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Answer:
present=60, total students=120
Step-by-step explanation:
let the no of students in each class =x
no of students absent=60
no of students present= 1/2(x)(2)+3/4(x)(4)+1/4(x)4
=2x/2+12x/4+4x/4
=x+3x+x=5x
total students in all classes=10x
no of students absent= total students-no of students present
60=10x-5x
60=5x
x=60/5=12
no of students present =5x=5(12)=60
total no of students=10x=10(12)=120
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