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1
In a class there are 5 boys and 5 girls. The teacher wants to select a boy and a girl to represent the class in a function. In how many ways can the teacher make this selection ?
10 ways.
25 ways.
5 ways.
15 ways.
2
If nPr = 360 , find r.
5
4
3
6
If P(n , 4) = 20 X P(n , 2) , Find n.
7
12
Compute factorial of 7
40320
5040
362880
36288
What will be the total ways in which 4 letter words can be formed from the letters of word MAHESH in which all vowels are always together?
68
72
What will be the total ways in which 4 letter words can be formed from the letters of word Delhi in which all vowels are always together ?
24
96
If there are 10 fountain pens and 12 ball point pens .In how many ways a person can buy a fountain pen and a ball pen ?
120 ways.
24 ways.
2 ways.
8
In a furniture shop there are 12 chairs and 15 tables. A customer can buy a chair and a table in how many ways ?
120 ways
180 ways
24 ways
27 ways
9
If there are 12 questions in ch-1,18 questions in ch-2 and 15 questions in ch-3. In how many ways teacher can select a question from any one of the 3 chapters?
45 ways.
65 ways.
216 ways.
180 ways.
10
In how many ways can 6 persons stand in a queue?
720
120
360
11
Among the 36 teachers in a school , one principal and one vice principal is to be appointed . In how many ways can this be done ?
1260
How many committee of five persons with a chairperson can be selected form 12 persons?
3965
3960
3300
3360
13
Compute the expression
42
44
26
14
There are 5 basket balls , 10 base balls and 2 cricket balls in a shop. In a how many ways players can buy three of them ?
100 ways.
17 ways.
13 ways .
15
All the five letters of the word TABLE are arranged to form different words without repeating any letter in any word. The words so formed are, then arranged as in dictionary. What will be the position of the word TABEL in that sequence ?
97
91
301
16
Which of the following statement is/are correct?
(a) In a box there are 14 black balls, 10 yellow balls and 5 white balls. The number of outcome for selecting one of these balls is 29
(b) In library there are 12 Moral Science books, 5 General Science books. The number of ways in which a student can pick one of these books in 17 ways.
Both (a) and (b) are correct.
Only (a) is correct.
Only (b) is correct.
None of these.
17
Find the total number of ways of answering five objective type questions each question having four choices.
625 ways.
1024 ways.
256 ways.
3125 ways.
18
Compute the following expression
489
640
306
204
19
Which of the following statement is /are correct?
(a) There are 20 dancers and 8 non dancers . In 160 ways the choreographer can choose a dancer and a non dancer .
(b) In a bakery there are 5 cakes ,7 pastries and 4 swiss rolls . In 16 ways a customer can buy a cake , pastry and a swiss role .
20
How many words, with or without meaning, can be formed using all the letters of the word 'EQUATION', using each letter exactly once.