# Data Interpretation - Bar Charts - Discussion

Discussion Forum : Bar Charts - Bar Chart 2 (Q.No. 1)
Directions to Solve

The bar graph given below shows the foreign exchange reserves of a country (in million US \$) from 1991 - 1992 to 1998 - 1999.

Foreign Exchange Reserves Of a Country. (in million US \$)

1.
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?
2:6
3:4
3:5
4:4
Explanation:

Average foreign exchange reserves over the given period = 3480 million US \$.

The country had reserves above 3480 million US \$ during the years 1992-93, 1996-97 and 1997-98, i.e., for 3 years and below 3480 million US \$ during the years 1991-92, 1993-94, 1994-95, 1995-56 and 1998-99 i.e., for 5 years.

Hence, required ratio = 3 : 5.

Discussion:
17 comments Page 1 of 2.

Rohini said:   3 years ago
Usually, we will find the average by adding all elements and divide by the number of elements, by doing so we got 3480.

Then, check-in table to below this average and above average you will get below in 5 years and above in 3 years.
(3)

Average foreign exchange reserves over the given period =

(2640+3720+2520+3360+3120+4320+5040+3120)/8= 3480 million US \$.

The country had reserves above 3480 million US \$ during the years 1992-93, 1996-97 and 1997-98, i.e., for 3 years and below 3480 million US \$ during the years 1991-92, 1993-94, 1994-95, 1995-56 and 1998-99 i.e., for 5 years.

Hence, required ratio = 3 : 5.
(2)

Khushi bajpai said:   4 years ago
Thanks @Poonam.
(1)

Kirti said:   7 years ago
Please tell how to visually look at the average?

Sia said:   5 years ago
@Poonam.

Thanks for explaining nicely.

Moni said:   5 years ago
Thanks for your brief explanation @Poonam.

Titus saylay sackie said:   6 years ago
Thanks for your perfect explanation @Poonam.

Richa magar said:   6 years ago
Thank you for easily explanation @Poonam.

Isha said:   7 years ago
Very good @Poonam.

Uday said:   7 years ago
@Rinchen Kinley that's is the formula! for taking the average and that's what they did! the sum of all the data by a number of observations.