Question

A box contains 150 black pens and 50 red pens. Jose said the sum of the probability that a randomly selected pen will not be black and the probability that the pen will not be red is 1. Explain whether you agree.

Answer 1

I don't agree the probability
Is a 3:1 ratio
Because the black pen amount is triple the red pen amount

Answer 2

Box contains = 150 Black pens and 50 red pens
Ratio = black pen : red pen
150 : 50
dividing both sides by 50
3 : 1
The ratio is 3 black pens for 1. Jose said wrong. OmG jose is a liar! xD