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Ashish Bajpai

BTech|| MBA || You Tuber Channel Name " Ashish Bajpai ".Full Maths Course on IIT JEE (2k+ Lessons) on Unacademy.

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Swati anand

8 months ago

Tanya mam you are amazing

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Tony Jim D

a year ago

permutations and combinations series consists 3 parts .

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Ashish Bajpai

a year ago

yes

Rahul Bansal

a year ago

sir the way in which 5 different balls can be distributed among three person such that each get at least one bol
I firstly Select 3 balls from the 5 balls and arrange them in three persons by factorial 3 then I distribute the remaining two balls by 9 ways but I didn't get the answer right the right answer is 150 and I am getting 540 please tell me my mistake in this method

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Ashish Bajpai

a year ago

Check the 3rd lecture of this course to understand error in selection

Jatin Dhanuk

a year ago

sir please ek question bta do please sir
prove that
n!/(n-r)!=n(n-1) (n-2)..…...(n-(r-1))

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Ashish Bajpai

a year ago

you should check my part 2 course for this proof

Jatin Dhanuk

a year ago

okay sir