To illustrate the general rule of multiplication, let's use the information supplied by the Dallas Independent School District (note this is fictitious data used for example purposes only). The district administrators collected these data because they perceived that students' workload was much higher in the summer months.

	Month of Distribution
	October-March	April-September	Total
Dallas ISD issue tablets 3 years and older	216	53	269
Dallas ISD issue tablets less than 3 years old	47	195	242
Total	263	248	511

a) What is the general rule of multiplication (include the denoted symbols (equation) with the definition)?

b) What is the probability that a student receives a tablet that is at least 3 years old and it is winter?