Question

A box contains 5 red pens 10 white pens and 20 green pens if one pen is taken out of

the box at random. What is the probability that the pen taken out will be

i) White pen ii) not a red pen​

Answer 1

White pen: 10/35 = 30%
Not a red pen: 30/35 = 85%

Answer 2

Explanation:

Firstly, find the total amount of pens

5 + 10 + 20 = 35, Total of 35 pens

White pens: 10/35

Not a red pen: 20 + 10= 30, 30/35

Calculate these to a percentage:

White- 10/35: 28.57%

Not a red pen- 30/35: 85.71%