Assignment:
For a certain animal species, the probability that a female will have a certain number of offspring in a given year is given in the table below. Find the expected number of offspring per year.
Number of Offspring: 0
Probability: 0.31
Number of Offspring: 1
Probability: 0.21
Number of Offspring: 2
Probability: 0.19
Number of Offspring: 3
Probability: 0.17
Number of Offspring: 4
Probability: 0.12
Provide complete and step by step solution for the question and show calculations and use formulas.