MEDIUM
CAT
IMPORTANT
Earn 100

Amartya Banerjee has forgotten the telephone number of his best friend Abhijit Roy. All he remembers is that the number had 8-digits and ended with an odd number and had exactly one 9. How many possible numbers does Amartya have to try to be sure that he gets the correct number?

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Important Questions on Permutations and Combinations

EASY
CAT
IMPORTANT
How to prepare for Quantitative Aptitude for the CAT>Chapter 26 - Permutations and Combinations>Level of Difficulty>Q 42
How many natural numbers not more than 4300 can be formed with the digits 0,1,2,3,4(if repetition of digits is allowed)?
EASY
CAT
IMPORTANT
How to prepare for Quantitative Aptitude for the CAT>Chapter 26 - Permutations and Combinations>Level of Difficulty>Q 43
How many natural numbers less than4300  can be formed with the digits 0,1,2,3,4(if repeatations are not allowed)?
EASY
CAT
IMPORTANT
How to prepare for Quantitative Aptitude for the CAT>Chapter 26 - Permutations and Combinations>Level of Difficulty>Q 44
How many even natural numbers divisible by 5 can be formed with the digits 0,1,2,3,4,5,6(if repeatations of digits not allowed)?
EASY
CAT
IMPORTANT
How to prepare for Quantitative Aptitude for the CAT>Chapter 26 - Permutations and Combinations>Level of Difficulty>Q 45
There are 100 articles numbered n1,n2,n3,n4,......n100. They are arranged in all possible ways. How many arrangements would be there in which n28 will always be before n29.
EASY
CAT
IMPORTANT
How to prepare for Quantitative Aptitude for the CAT>Chapter 26 - Permutations and Combinations>Level of Difficulty>Q 46
The letters of the word PASTE are written in all possible orders and these words are written out as in a dictionary. Then the rank of the word SPATE is:
EASY
CAT
IMPORTANT
How to prepare for Quantitative Aptitude for the CAT>Chapter 26 - Permutations and Combinations>Level of Difficulty>Q 47
The straight lines S1, S2, S3 are in a parallel and lie in the same plane. A total number of A points on S1; B points on S2 and C points on S3 are used to produce triangles. What is the maximum number of triangles formed?
EASY
CAT
IMPORTANT
How to prepare for Quantitative Aptitude for the CAT>Chapter 26 - Permutations and Combinations>Level of Difficulty>Q 48

The sides AB, BC, CA of a triangle ABC have 3, 4 and 5 interior points respectively on them. The total number of triangles. that can be constructed by using these points as vertices are:

MEDIUM
CAT
IMPORTANT
How to prepare for Quantitative Aptitude for the CAT>Chapter 26 - Permutations and Combinations>Level of Difficulty>Q 50
The AMS MOCK CAT test CATALYST 19 consists of four sections. Each section has a maximum marks of 45 marks. Find the number of ways in which a student can qualify in the AMS MOCK CAT if the qualifying mark is 90.