Question

Construct a probability distribution by listing the mass points of each of the random variables. Give the probability mass function and the graph the histogram.
1. The random variable X represents the number of blue balls drawn if four balls are drawn from a box which contains five red, five green and five blue balls.
2. The random variable Y represents the number of defective units selected when four units are chosen at random from a batch of 20 speakers where 3 of which are defective items.

Answer 1

sorry I don't know pagal