Question 691674



n=50, p=0.4, q=0.6

(a)

{{{V=n*p*q=50*0.4*0.6=12}}}

{{{sigma=sqrt(V)=sqrt(12)=2sqrt(3)}}}


(b) 
n=8
P(x>4)=P(x=5)+P(x=6)+P(x=7)+P(x=8)


(c)
n=10
P(x=1)+P(x=10)