exam
Maths Puzzle
If 6Pr=360 and 6Cr=15 find r ?
A.
4
B.
3
C.
6
D.
5
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exam Other Question
12 chairs are arranged in a row and are numbered 1 to 12. 4 men have to be seated in these chairs so that the chairs numbered 1 to 8 should be occupied and no two men occupy adjacent chairs. Find the number of ways the task can be done.
A.
360
B.
384
C.
432
D.
470
In how many ways can six different rings be worn on four fingers of one hand?
A.
10
B.
12
C.
15
D.
16