Question

A manufactured item is classified as good , a second , or defective, with probabilities 6/10;3/10;and 1/10 respectively. fifteen such items are selected at random from the production line. let x denote the number of good items, y the number of seconds and 15-x-y the number of defective items.(a) give the joint p.m.f of x and y

Answer 1

heya


15-6
/10=144/10
hp it hlps