Question

In a class of 20 ​students, on​ average, 4 will be​ left-handed. If a class includes 14 ​"lefties", estimate how many students are in the class.

Answer 1

For this case, we must indicate how many students there are in the class knowing that it includes 14 "lefties". For this, we make a rule of three:

20 -------------> 4

x ---------------> 14

Where the variable "x" the number of students in the class.

`x = \frac {14 * 20} {4}\\x = \frac {280} {4}\\x = 70`

Thus, if the class includes 14 left-handers, then according to the base average, the class will have a total of 70 students.

Answer:

70 students

Answer 2

70

Explanation:

The number in the class is 20/4 = 5 times the number of "lefties."

5 · 14 = 70

The class is estimated to have 70 students.