+0  
 
0
1188
1
avatar+173 

Compute (5C1+5C2+5C3) * (6C2+6C3+6C4)

 May 14, 2018
 #1
avatar+4622 
+1

Combinations!

\({5}\choose{1} \)+\({5}\choose{2}\)+\({5}\choose{3}\)\(5+10+10=25\)

\({6}\choose{2}\)+\({6}\choose{3}\)+\({6}\choose{4}\)=\(15+20+15=50\)

Thus, \(50*25=\boxed{1250}\)

smileysmiley

 May 14, 2018

2 Online Users