What was the difference between the average production of sugar during the year 1998, 1999, 2000, 2001 and that of 2001, 2002, 2003 and 2004 in thousand metric tons ?

Solution

In thousand metric tonnes:

Production in 1998 = 15

Production in 1999 = 50

Production in 2000 = 30

Production in 2001 = 45

Production in 2002 = 65

Production in 2003 = 75

Production in 2004 = 70

So, the difference between the averages = $$ \frac{15+50+30+45}{4} - \frac{45+65+75+70}{4}$$ = 35-63.75=28.75

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