Question

There are only real black and green pens in a box. There are three times as many red pens as green pens. There are four times as many black pens than red pens. Work out the probability of a black pen being selected.

Answer 1

Answer:

3/4

Step-by-step explanation:

Let the number of black pen be b, the green pen be g and the red pen be r.

Probability of a black pen being selected = 12g/16g = 3/4