Question

1. of the 50 students in the cafeteria, 7 have red hair. if there are 750 students in the school, predict the number of students who have red hair.

Explanation:

Step1: Set up proportion

Let $x$ be the number of students with red - hair in the school. The proportion is $\frac{7}{50}=\frac{x}{750}$.

Step2: Cross - multiply

$50x = 7\times750$.

Step3: Solve for $x$

$x=\frac{7\times750}{50}=105$.

Answer:

105