The total production in which of the following pairs of years is equal to 25 per cent of total production in all the years together ?
I. 1998 and 2004
II. 1998 and 2003
III. 1999 and 2001

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 total = 350

350 * 25% = 87.5

None of the above is the correct answer.

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The total production in which of the following pairs of years is equal to 25 per cent of total production in all the years together ?I. 1998 and 2004II. 1998 and 2003III. 1999 and 2001