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Answered on 11/12/2016 Learn Permutations +2 Class XI-XII Tuition (PUC) Mathematics

K.vaishali .

4x5x6x7x8=6720.
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Answered on 19/10/2020 Learn Permutations +2 Class XI-XII Tuition (PUC) Mathematics

Vikas Kumar

8!/(6!*2!) = (8*7*6!)/(6!*2*1) = 8*7/2 = 4*7 = 28
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Answered on 28/11/2016 Learn Permutations +2 Class XI-XII Tuition (PUC) Mathematics

Debojyoti Roy

Tutor

118.
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Answered on 06/12/2016 Learn Permutations +2 Class XI-XII Tuition (PUC) Mathematics

Sarvajeet Kumar

An Experienced Trainer

8.
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Answered on 02/12/2016 Learn Permutations +2 Class XI-XII Tuition (PUC) Mathematics

Abhilash

Teacher

In mathematics, the notion of permutation relates to the act of arranging all the members of a set into some sequence or order, or if the set is already ordered, rearranging (reordering) its elements, a process called permuting.
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Answered on 06/12/2016 Learn Permutations +2 Class XI-XII Tuition (PUC) Mathematics

Rohit Singh

Commerce Master

9*8*7=504 types number can formed by using 1 to 9 digit of 3 digit numbers without repeated number.
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Answered on 06/12/2016 Learn Permutations +2 Class XI-XII Tuition (PUC) Mathematics

Sarvajeet Kumar

An Experienced Trainer

6! = 720.
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Answered on 30/11/2016 Learn Permutations +2 Class XI-XII Tuition (PUC) Mathematics

Given 5 flags of different colours, how many different signals can be generated if each signal requires... read more
Given 5 flags of different colours, how many different signals can be generated if each signal requires the use of 2 flags, one below the other? read less

Abhilash Sharma

Teacher for 8th-12th)

5C2 *2! = 20 Out of 5 flags choosing any two will give you a signal. Now these flags can be interchanged (suppose red on top and blue below it, now blue on top and red below it) Hence 2! for this arrangement among these two colours themselves.
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Answered on 23/10/2016 Learn Permutations +2 Class XI-XII Tuition (PUC) Mathematics

Debojyoti Roy

Tutor

7!/(7-6)! =7!/1! =7*6*5*4*3*2*1
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