Direction: Study the following information carefully and answer the given…

Direction: Study the following information carefully and answer the given questions.

Eight persons A, B, C, D, E, F, G and H are working in a company in three different departments – Production, Management and Finance on two posts – Manager and General Manager but not necessarily in the same order. All they have different ages in the whole number.
E’s age is twice of C’s age. A is 53 years old and working in production. The persons whose total age is 100 years are working in Finance as General Manager. F is working in Production. B is working in management but not with D and posts of B and D are different. Both H and G are working at same post but not in production department. Both H and F are working at different post. Not more than two persons working on same post in same department.
Both E and A working in same department but at different post. Both A and D work in different post. Sum of the ages of C and G is 64 years. Both C and D are manager but in different departments but not in the production. E is 12 years older to F and 12 years younger to H. Difference between the age of C and D is equal to H’s age. B is 30 years old and its age is half the H’s age.

How many persons are working as manager?