Final answer:
The random variable X represents the amount of donation for a recent graduate. The probability P(x<25) cannot be computed without additional information.
Step-by-step explanation:
The random variable X is defined as the amount of donation for a person selected at random from the population of last year's graduates.
The probability P(x<25) represents the probability that the amount of donation is less than 25.
To find this probability, you would need the probability distribution of donations or the cumulative distribution function, which is not provided in the given information.