Question

A survey with 20 students is taken.

Find the number of students who prefer course books from Friend P's survey, if there are a total of 900 students in a school.

• A. 250
• B. 270
• C. 400
• D. 360

Answer 1

The correct option is D 360

The survey is taken with 20 students.

The number of students who chose course book in Friend P's survey is 8.

The necessary proportion = $\frac{8}{20}$

The number of students who prefer course book

= $\frac{8}{20}$$\times$ 900

= 360

Hence, the number of students who prefer course book = 360