Question : Direction: Study the following bar diagram carefully and answer the question. The bar graph given below shows the foreign exchange reserves of a country (in million US dollars) from 1991– 1992 to 1998– 1999.
The ratio of the number of years in which the foreign exchange reserves are above the average reserves to those in which the reserves are below the average reserves is:
Option 1: 2 : 6
Option 2: 3 : 4
Option 3: 3 : 5
Option 4: 4 : 5
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Correct Answer: 3 : 5
Solution :
Average foreign exchange reserves over the given period = $\frac{2640+3720+2520+3360+3120+4320+5040+3120}{8}$ = 3480 million US dollars
So, years with higher foreign exchange reserves than average are 1992– 1993, 1996– 1997, and 1997– 1998 = 3 years.
Also, 5 years worth of foreign exchange reserves fall short of average reserves: 1991– 1992, 1993– 1994, 1994– 1995, 1995– 1996, and 1998– 1999.
So, the required ratio is 3 : 5.
Hence, the correct answer is 3 : 5.
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