If Two Events, a and B, Are Mutually Exclusive, Then $P ( A \text { and } B ) = P ( A ) \times P ( B ) \text {. }$

question 44

True/False

If two events, A and B, are mutually exclusive, then $P ( A \text { and } B ) = P ( A ) \times P ( B ) \text {. }$

---

Definitions:

Menarche

The first occurrence of menstruation in a female, marking a significant milestone in the transition from girlhood to womanhood within the context of physical and reproductive development.

Ovulation

Ovulation is a phase in the female menstrual cycle where an egg is released from the ovary, making it available for fertilization.

Delayed Circadian Phase

A shift in the sleep–wake pattern in which adolescents tend to stay up later at night than they did as children and then sleep later in the morning.

Circadian Rhythm

The natural internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours.