Class 11MathematicsPermutation and CombinationDefinition of permutation, Number of permutations with or without repetition, Conditional permutations
EasyGiven $4$ flags of different colours,how many different signals can be generated,if a signal requires the use of $2$ flags one below the other?
- A$12$
- B$16$
- C$8$
- D$24$
Explore More
Similar Questions
The value of ${}^7P_3 - 3({}^6P_2)$ is equal to
The sum of the units digits of all numbers formed using the digits $3, 4, 5, 6$ without repetition is......
Easy
View SolutionHow many $5$-digit telephone numbers can be constructed using the digits $0$ to $9$ if each number starts with $67$ and no digit appears more than once?
Easy
View SolutionIf all the words,with or without meaning,are written using the letters of the word $QUEEN$ and are arranged as in an English dictionary,then the position of the word $QUEEN$ is (in $^{th}$)
DifficultJEE MAIN 2017
View SolutionIf all the letters of the word $MOST$ are permuted and the words (with or without meaning) thus obtained are arranged in the dictionary order,then the rank of the word $STOM$ when counted from the rank of the word $MOST$ is:
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo