What was the difference between the average exports of the three Companies in 1993 and the average exports in 1998?

Answer: Option C

Explanation:

Average exports of the three Companies X, Y and Z in 1993

= Rs.		1	x (30 + 80 + 60)		crores = Rs.		170		crores.
		3					3

Average exports of the three Companies X, Y and Z in 1998

= Rs.		1	x (50 + 100 + 80)		crores = Rs.		230		crores.
		3					3

Difference

= Rs.			230		-		170			crores
			3				3

= Rs.		60		crores
		3

= Rs. 20 crores.