Study the given graph carefully to answer the questions that follow:
Number of people (in thousand) using three different types of mobile services over the years
What is the total number of people using mobile service M in the year 2008 and 2009 together ?
Number of people using M in 2008 = (50-10)*1000 = 40000
Number of people using M in 2009 = (30-10)*1000 = 20000
Total number of people = 40000+20000 = 60000
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