1The random variable R has the binomial distribution B(12, 0.35).

(a)   Find P(R ³ 4).

(2)

The random variable S has the Poisson distribution with mean 2.71.

(b)   Find P(S £ 1).

(3)

The random variable T has the normal distribution N(25, 52).

(c)   Find P(T £ 18).

(2)



2Minor defects occur in a particular make of carpet at a mean rate of 0.05 per m2 ( Read more... )