Question

There are some black and white buttons in a container.

Answer 1

ANSWER

60 buttons.

EXPLANATION

Let the number of buttons in the container be x.

Then the number of buttons that are black are:

$\frac{7}{10} x$

The number of buttons that are white

$\frac{3}{10} x$

The difference between the white and the black buttons

$\frac{4x}{10} = 24$

Solve for x.

$4x = 240$

$x = \frac{240}{4}$

$x = 60$

Hence there are 60 buttons in the container.