#2.binomial n<- 10;p<-0.25 pbinom(2,size=n,prob=p) np sqrt(np*(1-p))

#3.Poisson lambda<- 8 dpois(5,lambda) 1-ppois(12,lambda),

#3.normal & z mu<-3; sigma<-0.5 pnorm(4,mean=mu,sd=sigma) qnorm(0.95,mean=mu,sd=sigma)