Question

A box of pens contains 16
red pens and 8
black.
What percentage of pens are red?

Answer 1

You need to make a probability tree diagram so you can work out the odds:

Overall you will end up with

8

11

(original amount of black pens) multiplied by

7

10

(amount of black pens left in the box) +

3

11

(overall amount of red pens) multiplied by

2

10

(amount of red pens left in the box).

This = 0.563 chance that you will pick 2 pens of the same colour, whether they be 2 black or 2 red.

Answer 2

Answer:

200%

Step-by-step explanation:

It is 200% because it is completely double of the original amount