Step: 1
From the double bar graph, the production of capsules during first, second, third and fourth quarters of the year 2000 are 2, 7, 4, 8 respectively and in the year 2001 are 3, 5, 8, 4 respectively.
Step: 2
Total production in the year 2000 = 2 + 7 + 4 + 8 = 21 tons
Step: 3
Total production in the year 2001 = 3 + 5 + 8 + 4 = 20 tons
Step: 4
The difference between the total production of the two years = 21 - 20 = 1 ton.
Correct Answer is : 1 ton