Question numbers 1 to 6 are based on the tabulated data given below:
: 
A Company has 20 employees with their ages (in years)and salary (in thousand rupees per month) mentioned against each of them : 

1. Classify the data of age of each employee in class interval of 5 years. Which class interval of 5 years has the maximum average salary
(A) 35 - 40 years
(B) 40 - 45 years
(C) 45 - 50 years
(D) 50 - 55 years

2. What is the frequency (PERC) in the class interval of 30 - 35 years ximum average salary
(A) 20 PERC
(B) 25 PERC
(C) 30 PERC
(D) 35 PERC

3. What is the average age of the employees
(A) 40.3 years
(B) 38.6 years
(C) 47.2 years
(D) 45.3 years

4. What is the fraction (PERC) of employees getting salary >= 40,000 per month age salary
(A) 45 PERC
(B) 50 PERC
(C) 35 PERC
(D) 32 PERC

5. What is the average salary (in thousand per month) in the age group 40 - 50 years salary
(A) 35
(B) 42.5
(C) 40.5
(D) 36.5

6. What is the fraction of employees getting salary less than the average salary of all the employees
(A) 45 PERC
(B) 50 PERC
(C) 55 PERC
(D) 47 PERC