Question

in a class of 30 students on average 6 will be left-handed if a class includes 27 Lefty's estimate how many students are in the class

Answer 1

6/30 = 1/5

This means that 1/5 of the students in a class will be left-handed.
27*5 = 135
27/135 = 1/5

The correct answer is 135 students.