MBA Exam

n things (each thing belonging to a particular place ) have to be distributed in n places so that no particular thing is arranged its correct place.Plz provide the logic for the formula .... ?

1) n!-n!/1! + n!/2! .......

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MBA Other Question

A and B are two points in a plane which are 10 m apart.The angle of elevation of tower as seen from A and B are respectively as 30 and 6o degrees..If AB subtends an angle of 60 at the foot of the tower, find the height of the tower.

1) 10* root3/root7
2) 10/root7
3) 100* root3/root7
4) none
Nine dots are placed on a piece of paper. Find the maximum number of right angled triangles which
can be formed by joining any three dots.Please tag me in the solution.

1) 18
2) 36
3) 40
4) 44
5) 48