In an assembly ground there are 9 rows of students. Estimate the total number of students if in each row 21 students are there.

150

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180

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200

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240

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Solution

The correct option is C 200
Total number of rows = 9
We need to estimate the total number of students
So, 9 rows can be rounded off to 10 rows
One row has 21 students so
21 students can be rounded off to 20 students
So to find total number of students we need to perform
Number of rows x students in a row
10 x 20
10
x 20
200

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