Question 1187601
X P(X)
0 .44^3=0.0852
1  3C1*.56^1*.44^2=0.3252
2  3C2*0.56^2*0.44=0.4140
3 0.56^3=0.1756
They add to 1.0, as they must.
E(x)=np=3*0.56=1.68
V(x)=np(1-p)=1.68*0.44=0.7392
sd= sqrt (V)=0.8598