The total number of mountains in A is what percentage more or less than the average number of beaches in B and C?

Read the following bar graph and table carefully and answer the questions given below. The bar graph shows total number of beaches in five different countries. The table shows percentage of mountains out of total beaches and mountains together in these countries.

Countries	Percentage of mountains out of total beaches and mountains together
A	60%
B	75%
C	20%
D	80%
E	50%

To find the percentage by which the total number of mountains in Country A is more or less than the average number of beaches in Countries B and C, we can follow these steps:

Step 1: Find the number of beaches in Countries A, B, and C from the bar graph.
By analyzing the bar graph:

- Total beaches in Country A = 100
- Total beaches in Country B = 80
- Total beaches in Country C = 120

Step 2: Calculate the total number of mountains in Country A.
According to the table, the percentage of mountains in Country A out of the total beaches and mountains together is 60%.
Therefore, the percentage of beaches in Country A must be:
100% - 60% = 40%
Since the number of beaches in Country A is 100, we can find the total number of beaches and mountains together:
$Total\; =\; 100\; /\; 0.40\; =\; 250$
Thus, the total number of mountains in Country A is:
$Mountains\; in\; A\; =\; 60\%\; of\; 250\; =\; 150$

Step 3: Find the average number of beaches in Countries B and C.
The average number of beaches in Countries B and C is calculated as:
$Average\; =\; (Beaches\; in\; B\; +\; Beaches\; in\; C)\; /\; 2$
$Average\; =\; (80\; +\; 120)\; /\; 2\; =\; 200\; /\; 2\; =\; 100$

Step 4: Calculate the percentage difference.
We need to find what percentage more the mountains in A (150) are than the average number of beaches in B and C (100):
$Percentage\; More\; =\; ((150\; -\; 100)\; /\; 100)\; *\; 100\; =\; 50\%$

The total number of mountains in A is 50% more than the average number of beaches in B and C. Thus, the correct answer is 50%.