Question
Nine boys have to stand in a circle. In how many ways
they are to be stand on the circumference of circle?Solution
Any boy may be stand on any place so there is no difference in clockwise and anticlockwise direction here.  Requirement permutations = 1/2 × (n - 1)!  => 1/2 × (9 - 1)!  => 1/2 × 8!  => 20160
What will be the age of A after 3 years?
Quantity I: The ratio between the present ages of A and B is 9:13 respectively and B is 8 years elder th...
[R] is how much less than the total number of masks sold on Wednesday?
The number of males working in the IT department forms what per cent of the total number of males in the organization?
Find the ratio between total Chocolate cookies baked on Sunday and Monday together to Butter cookies baked on Monday and Tuesday together.
Total number of burgers sold by Piccolo is approximately what percent of the total number of Veggie burgers sold by all the three cafes?
Find the difference between the number of males and number of females of tribe Raba.
If in 2018, number of female employees who are unmarried reduces by 20%, find number female employees who are married in 2018 (consider total number of...
Number of male employees in HR department was how much percent more/less than the number of female employees in Marketing department?
How many students appeared in exam X or in exam Z?
In school B, if 24 sweets are given to 1 boy and 16 sweets given to 1 girl, then find the Total sweets given to all boys and girlsÂ
Relevant for Exams:
