Answer:
a. discrete random variable
Step-by-step explanation:
A discrete random variable is one which may take on only a countable number of distinct values such as 0, 1, 2, 3, 4, etc. Discrete random variables are usually countable.
From the question:
The experiment consist of making 80 telephone calls in order to sell a particular insurance policy. 80 here is the random variable; 80 is countable anf finite.
So, 80 is a discrete random variable
Answer:
Step-by-step explanation:
Given that

Right side has values as
53, 53+77, 53+2(77),+....
We have to find one which is a perfect square.
We have from this series 361 is 19 square
Thus 
Next is 
and so on.
A triangle, it might be an obtuse
Answer:
what
Step-by-step explanation: