The law of diminishing marginal utility applies to a

The law of diminishing marginal utility states that as a consumer consumes more and more units of a particular good or service, the additional satisfaction or utility that he derives from each additional unit goes on decreasing. In other words, the consumer will derive less and less satisfaction from each additional unit consumed, up to a point where the satisfaction derived from each additional unit consumed becomes zero or negative. Therefore, the law of diminishing marginal utility applies to a consumer who is trying to maximize his or her satisfaction from consuming a particular good or service.