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The stem and leaf diagram shows the ages of 15 office workers.
2 3 5
Key: 23 represents 23 years old
3 4 5 8 8 9
4 1 2 4 6-7 8
5 39
a) How many workers are over 40 years old?
8
workers
b) What is the median age of an office worker?
years old
c) The oldest worker retires and is replaced by a 24 year old.
What is the new median age?
years old