A record store receives orders from the following age groups:

age percentage

under 20 30

20 - 29 13

30-39 20

40 - 49 27

50 and over 10

If a customer is selected at random, find the probability that he or she is in the following age groups.

p (age between 30 and 39)

p (age under 30)

p (age over 29 or under 50)

p (age under 20 or over 49)