exam Maths Puzzle


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

Read Solution (Total 1)

exam Other Question


Ten different letters of alphabet are given, words with 5 letters are formed from these given letters. Then, the number of words which have at least one letter repeated is:

A.

69760

B.

30240

C.

99748

D.

42386
If 6Pr=360 and 6Cr=15 find r ?

A.

4

B.

3

C.

6

D.

5