Robort sells automobile 60 of people choose 4 door car the

Robort sells automobile, 60 % of people choose 4 - door car, the rest z - door car. What is the probability of selling two 4 - door automobiles to the next 3 customers?

Solution

let success means selling 4-door automobiles ,then p =0.6,here n =3

X -number of 4-door automobiles.

X -Binomial (3,0.6)

so P(X =2) = 3C2 *(0.6)^2 (1-0.6)^1

= 3*0.36*0.4

= 0.432