The bar graph given below shows the earning of a company (in million) from 1991 to 1999. Read it and answer the following questions correctly.

The ratio of number of years, in which earnings of a company are below the average earning, to those in which the earnings are above the average is

Correct option is C

Given:

Earnings for the 8 years are:

2640, 3720, 2520, 3360, 3120, 4320, 5040, 3120.

Formula Used:

The average earning is calculated as:

​$$\text{Average Earning} = \frac{\text{Sum of all earnings}}{\text{Number of years}}$$​​

Solution:

1. Calculate the sum of all earnings:

2640 + 3720 + 2520 + 3360 + 3120 + 4320 + 5040 + 3120 = 27,840.

2. Calculate the average earning:

​$$\text{Average Earning} = \frac{27,840}{8} = 3480$$​

Comparison of Earnings with Average (3480):

Count the Years:

- Below average: 5 years (1991-92, 1993-94, 1994-95, 1995-96, 1998-99).

- Above average: 3 years (1992-93, 1996-97, 1997-98).

Ratio:

Ratio (Below : Above) = 5 : 3

Final Answer:

​$$\boxed{5:3}$$​​