Question 17 - (2 marks available) There are between 24 and 40 students in a class.
The ratio of boys to girls is 4:7
How many students are in the class?

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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