1. is process that you can do over and over, where each result does not affect the next. ex. flipping a coin, rolling dice, choosing a card, etc.

Probability experiment or a trail is process that you can do over and over, where each result does not affect the next

Explanation: Trail is defined as a procedure that can repeated any number of times and the result of one trial does not affect the next. This mean each trail or a probability experiment is independent and not associated with the last result.

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons