CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

Write the value of 6r=156rC3+50C4.


Solution

6r=156rC3+50C4.

=561C3+ 562C3+ 563C3+ 564C4+ 565C5+ 566C6+ 50C4= 55C3+ 54C3+ 53C3+ 52C3+ 51C3+ 50C3+ 50C4

= 561C3+ 562C3+ 563C3+ 564C4+ 565C5+ 566C6+ 50C4= 55C3+ 54C3+ 53C3+ 52C3+ 51C3+ 50C3+ 50C4= 55C3+ 54C3+ 53C3+ 52C3+( 50C3+ 51C4)           
= 55C3+ 54C3+ 53C3+ 52C3+ 51C3+( 51C3+ 51C4)           {Using nCr+nCr1=n+1Cr}
= 55C3+= 54C3+( 55C3+ 54C4)= 55C3+( 54C3+ 55C4)=( 55C3+ 55C4)= 56C4
So, 
6r=156rC3+ 50C4= 56C4


Mathematics
RD Sharma
Standard XI

Suggest Corrections
thumbs-up
 
0


similar_icon
Similar questions
View More


similar_icon
Same exercise questions
View More


similar_icon
People also searched for
View More



footer-image