Fuzzy methods incorporated to the study of personal insurances

The price of the individual life insurance depends on the insurer's age and the technical interest rate. The first is a random variable and its performance is determined by a mortality law. The second variable traditionally has been considered a certain parameter in spite of being an uncertain variable. The purpose of this paper is to analyze how to fix premiums of some types of life insurance including the randomness of the mortality of an individual and the uncertainty associated with the interest rate that the insurance company will obtain investing the premiums.