Mathematics questions
18011 published questions with worked solutions.
- Statement 1: If a,b,c are positive integers such that a+b+c 8, then the number of possible values of the ordered triplets (a,b,c)...
- The number of ways in which seven persons can be arranged at a round table, if two particular persons may not sit together is
- Statement 1: The sum of the digits in the tens place of all numbers formed with the help of 2,3,4,5 taken all at a time is 84....
- The number of ordered triplets of positives integers which are solutions of the equations x+y+z=100, is
- A box contains two white balls, three black balls and four red balls. In how many ways can three balls be drawn from the box, if...
- 4 buses runs between Bhopal and Gwalior. If a man goes from Gwalior to Bhopal by a bus and comes back to Gwalior by another bus,...
- The number of group that can be made from 5 different green balls, 4 different blue balls and 3 different red balls, if at latest...
- In how many ways 3 letters can be posted in 4 letter-boxes, if all the letters are not posted in the same letter-box?
- If a_n= _ r=0 ^n 1 ^nC_r , then _ r=0 ^n r ^nC_r equals
- The number of mappings (functions) from the set A= 1,2,3 into the set B= 1,2,3,4,5,6,7 such that f(i) f(j) whenever i<j, is
- Total number of n digit numbers (n>1) having the property that no two consecutive digits are same, is
- The lock of a safe consists of five discs each of which features the digits 0,1,2, ,9. The safe can be opened by dialing a...
- ^nC_r+2 , ^nC_ r-1 + ^nC_ r-2 is equal to
- In an examination there are three multiple choice questions and each question has 4 choices. Number of ways in which a student...
- A person goes for an examination in which there are four papers with a maximum of m marks from each paper. The number of ways in...
- The number of arrangements of the letters of the word BANANA in which the two N's do not appear adjacently, is
- There are 6 letters and 3 post-boxes. The number of ways in which these letters can be posted, is
- Consider the following statements: 1. There are 12 points in a plane of which only 5 are collinear, then the number of straight...
- Let A be the set of 4 digit number a_1a_2a_3a_4, where a_1<a_2<a_3<a_4, then n(A) is equal to
- A car will hold 2 in the front seat and 1 in the rear seat. If among 6 persons 2 can drive, then number of ways in which the car...