Fuzzy numbers are widely used tool to represent impreciseness in the natural phenomenon. Pentagonal Fuzzy Number (PFN) is a type of fuzzy number, where the left and right continuous functions have the variations in the α-level. In this paper, we made a study on traditional defuzzification methods where the inputs are of pentagonal fuzzy numbers. Through this paper, we introduce a new defuzzification formula to calculate the crisp output from two vague pentagonal fuzzy number inputs.
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