can anyone pls solve this with steps and help me!!!
:)
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Step-by-step explanation:
since nCr= n! / r!(n-r)!
=> 40+r.C 10+r= (40+r) ! / (10+r)! ( 40+r-10-r) !
=>( 40+r) ! / (10+r) ! 30 !
therefore,
41C11+41C12+43C13+. .........,.+50C20
= 41!/11! 30!+42!/12!30! + 50!/ 20!30!
putting the value and then calculate.
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