Permutation, Combination and Probability Page-2
9) How many words can be formed from the letters of the word 'PLANE' using all letters when no letter is to be repeated.
(A) 120
(B) 60
(C) 15
(D) 5
10) How many 3-digit numbers can be formed by using each one of the digits 2,3,5,7,9 only once.
(A) 120
(B) 60
(C) 15
(D) 5
11) There are 5 green and 3 red balls In a box, one ball is taken out. What is the probability that the ball is green.
(A) 5/8
(B) 3/8
(C) 0
(D) 1

12) In how many ways can 4 keys be arranged on a circular key ring?
(A) 24
(B) 6
(C) 3
(D) 4

13) Evaluate 12C3
(A) 220
(B) 36
(C) 1320
(D) 72

14) Find the number of diagonals of a 6-sided figure.
(A) 15
(B) 12
(C) 6
(D) 9

15) In how many ways can a hockey team of 11 players be selected out of 15 players.
(A) 1365
(B) 32760
(C) 8190
(D) 2730

16) A dice is rolled. What is the probability that the dots on the top are greater than 4?
(A) 1/3
(B) 1/2
(C) 2
(D) 2/3



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