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Division of a Whole Number with Powers of 10

The total of ...

Question

The total of test scores of 100 students is 7,800. Find the average score of a student.

A

78.00

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B

780

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C

7.8

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D

7800

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Solution

The correct option is A 78.00
Total test scores of 100 students = 7,800

Average test score = 7800.00 $\div$ 100

To divide a number by 100, we have to move the decimal point two places to the left.

$⟹$ 7800.00 $\div$ 100 = 78.00

Hence, the average test score = 78.00

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