A company has four different departments A, B, C, and D . Employees from these departments are selected for a workshop to be held outside 

India. The no. of employees selected from A is equal to the number of employees selected from B. The ratio of no. of employees selected 

from B and C is 3 : 4 and that of A and D is 1 : 2. If on the whole 20% of total employees of the company are selected then from how many 

departments, the no. of employees selected is more than 25% ?

(Each department has equal no. of employees)