Line graph shows number of departments and average number of employees in all the departments in five different companies (P, Q, R, S and T). Read the following line graph carefully and answer the questions given below.

Find the average of total number of employees in all the departments of P, Q and S.

The correct answer is 1125.

From the given line graph, we can observe two lines for five companies (P, Q, R, S, and T):

1. Blue Line: Represents the Number of departments in each company.
2. Orange Line: Represents the Average number of employees in all departments of each company.

To find the total number of employees in any company, we multiply the number of departments by the average number of employees per department:

$\text{Total Employees}=\text{Number of departments}\times \text{Average number of employees in all departments}$

Let's extract the values for companies P, Q, and S from the line graph:

1. Company P:
- Number of departments = 15
- Average number of employees in all departments = 35
- Total employees in P = $15\times 35=525$

2. Company Q:
- Number of departments = 20
- Average number of employees in all departments = 60
- Total employees in Q = $20\times 60=1200$

3. Company S:
- Number of departments = 30
- Average number of employees in all departments = 55
- Total employees in S = $30\times 55=1650$

Now, calculate the sum of total employees in companies P, Q, and S:

$\text{Sum of total employees}=525+1200+1650=3375$

Finally, find the average of total number of employees in P, Q, and S across the 3 companies:

$\text{Required Average}=\frac{3375}{3}=1125$