Question

One factory produces 20 identical pencils per minute, 3 of which come out defective. A
worker makes a random choice by drawing two pencils. Find as follows;
(a) Which are the values of the Variable X (random choice)?
(b) Find the probability of the Random Variable X (the probabilistic distribution f(x) for the
number of defectives). Construct the proper table.
(c) Find the discrete distribution function F(x) of discrete random variable X with probabilistic
distribution f (x). Construct the proper table.
(d) Sketch the graph of discrete distribution function F(x), (found at the point c) above).

Answer 1