Question

30% of the members of a library are students, and 20% of these students are less than 18 years old. 30 students are less than 18 years old.
a)How many students are members?
b)What is the total number of members?
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Answer 1

Step-by-step explanation:

There are 15 boys. Here's how I came to that answer. If the amount of boys in the class (represented by "X"), given that there are 25 students in total, is equal to 60 percent, you can make a simple proportion, assigning the unknown value a variable, such as X. From then, you can cross multiply and solve. Take a look:

X/25 = 60/100

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