Question

Of the 50 student in the cafeteria, 7 have red hair. If there are 750 students in the school, predict the number of students who have red hair.

Answer 1

Given data,

Of the 50 students in the cafeteria

7 have red hair.

Total number of students = 750

To find:

The proportion that could be used to predict the number of students who have red hair.

Let us assume the number of students who have red hair = x

The ratio of student having red hair to the total number of students are

                           $Ratio (1) = \frac{7}{50}$

                           $Ratio (2) = \frac{x}{750}$

The number of students having red hair is proportional to the total number of students. So, the above ratios are equal.

                                    $\frac{x}{750} = \frac{7}{50}$

Cross multiplication,

                                    50x = 7 * 750

                                     50x = 5250

                                          x = 5250/50

                                          x = 105

Therefore,

The required equation is $\frac{x}{750} = \frac{7}{50}$  and the number of students who have red hair is 105.

Learn more about event correlation here: brainly.com/question/10831881

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