Question

One fourth of total number of students in a class isin Maths lab, one third isin physics lab, one sixth are in Chemistry lab and 10 are in Biology lab. How many students are there in the class?

Answer 1

Answer:

Let the total number of students be x.

$\frac{x}{4} + \frac{x}{3} + \frac{x}{6} + 10 = x$

$\frac{3x}{12} + \frac{4x}{12} + \frac{2x}{12} + 10 = x$

$\frac{9x}{12} + 10 = x$

$\frac{12x - 9x}{12} = 10$

$x = 40$