The annual meet was attended by 20 persons. The persons who attended the meet have worked in eight different firms – M, BC, K, A, BA, D, PC and E. The following table provides information about the count of persons who have worked in exactly one, two, three, four, five and six of the given eight firms. At least one person worked in each of the given eight firms.
Person count 1 4 5 2 6 2 Firm Count 1 2 3 4 5 6
The information about the number of persons who worked in a particular firm.The table provides provides information about only four of the eight firms but does not specify them.
Firm 4 -9 Firm 3 -13 Firm 2 -8 Firm 1 -11
If there is no firm in which less than 5 people have worked, then at most how many persons could have worked in a particular firm?
There are exactly X firms in which exactly Y persons have worked. What could be the maximum possible value of X?
For at most how many firms, the number of persons who have worked in it is more than those who have worked for Firm 4?
Please tell the approach.