Examination 7504

Class 7B is having a preventive dental check-up. Two dental caries were found in a quarter of the pupils and one caries in an eighth. Half of the class had all their teeth healthy. How many pupils go to class 7B if three pupils are absent on the day of the dental examination?

Correct answer:

n =  24

Step-by-step explanation:

4n+8n+2n+3=n  n/4+n/8+n/2+3=n  n=24  n=124=24  n=24



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