Complementary Probability Worksheet

Work out the following.
When necessary, give your answer in fractions eg. 2/5

1. A set of cards with a letter on each card as shown below are placed into a bag. Howard picks a card at random from the bag.

Determine the probability that the card is:
a) an E.


b) not an E.


c) not a vowel.


d) a P.


e) not a P.


f) either a Q or U or H


g) not a Q, U or H.



2. A number is chosen at random from a set of whole numbers from 1 to 50. Calculate the probability that the chosen number:
a) is not a perfect square


b) is not a multiple of 4


c) is more than 45


d) is not more than 45