Final answer:
The probability that one of the two parts is scrapped can be calculated using conditional probability.
Step-by-step explanation:
The probability that one of the two parts is scrapped can be calculated using conditional probability. Let's assume that the probability of the larger fragment being scrapped is P(larger) and the probability of the smaller fragment being scrapped is P(smaller).
Since every fission event results in just two fragments (one bigger and one smaller), the probability of both fragments being scrapped is P(larger) * P(smaller).
Therefore, the probability that one of the two parts is scrapped is equal to 1 - P(larger) * P(smaller).