Permutations and Combinations Test

Result

Permutations and Combinations Test - 57

Score
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out of -
Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

A

B

C

D
None of these

Solution
Question 3
4 / -1

A

B

C

D

Solution
Question 4
4 / -1

On the occasion of Deepawali festival each student of a class sends greeting cards to the others. If there are 20 students in the class, then the total number of greeting cards exchanged by the students is

A

B

C

D
None of these

Solution
Question 5
4 / -1

In a city no two persons have identical set of teeth and there is no person without a tooth. Also no person has more than 32 teeth. If we disregard the shape and size of tooth and consider only the positioning of the teeth, then the maximum population of the city is

A
2³²

B
(32)² - 1

C
2³² - 1

D
2^32-1
Question 6
4 / -1

In a mathematics paper there are three sections containing 4, 5 and 6 questions respectively. From each section 3 questions are to be answered. In how many ways can the selection of questions be made?

A
34

B
800

C
1600

D
9600

Solution
Question 7
4 / -1

10 different letters of English alphabet are given. Out of these letters, words of 5 letters are formed. How many words are formed when at least one letter is repeated

A
69760

B
98748

C
96747

D
97147

Solution
Question 8
4 / -1

The number of ways in which four letters of the word \'MATHEMATICS\' can be arranged is given by

A
136

B
192

C
1680

D
2454

Solution
Question 9
4 / -1

There are 15 persons in a party and each person shake hand with another, then total number of hand shakes is

A

B

C
15!

D
2(15!)
Question 10
4 / -1

A
n + 1

B

C
n + 2

D
None of these

Solution