the average of mask donated by 50 students is 30 when the teacher donated mask the average increased by 1.how much mask did the teacher donated?
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the teacher donated average 2
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Given,
Total students = 50
Average masks by students = 30
When teacher donated masks the average increased by 1
To find,
The number of masks donated by the teacher.
Solution,
First of all, we need to calculate the total number of masks that is donated by the students.
Total masks = Average × Total students = 50×30 = 1500
Now, the average masks when teacher donated
= 30+1 = 31
Total masks when teacher donated = 31 × 51 = 1581
Teacher donated = 1581-1500 = 81
Hence,the teacher donated 81 masks.
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