+0  
 
+1
35
2
avatar+363 

In the row of Pascal's triangle that starts 1, 11, what is the ninth number?

Mr.Owl  Dec 4, 2017
Sort: 

2+0 Answers

 #1
avatar+354 
+3

165

 

8)

 #2
avatar+79846 
+2

This will be the 11th row of the triangle  [ where the first "row"  = 1  is termed row "0" ]

 

The rth number on the nth row  is given by   C(n, r - 1)

 

So the ninth number on this row will be given by

 

C (11, 9 - 1)  = C(11,8)  =  165

 

 

cool cool cool

CPhill  Dec 4, 2017

17 Online Users

avatar
avatar
avatar
avatar
avatar
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details