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 . 5 classes were half full , 3 classes were 3/4 full and 2 classes were 1/8 empty . a total of 70 students were absent . how many students are in this school when no students are absent ?

Answer :

Given  : School has 10 classes with the same number of students in each class , So

Let , Total number of students in one class  =  x 

So,

Total number of students in school  =  10x 

And 

5 classes were half full , 3 classes were 34 full and 2 classes were 18empty , Total students absent is 70

So,

5x - 5x2 +3x  - 3x4 + 2x×18 = 705x2 +9x4 + x4 = 7010x + 9x + x4  = 7020 x4  = 705x  = 70x  = 705x  =14 

Then ,

Total number of students in school  =  10 ( 14 ) =  140                                        (  Ans )

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