Figures obtained from a city's police department seem to indicate that of all motor vehicles reported as stolen, 69% were stolen by professionals (P), whereas 31% were stolen by amateurs (primarily for joy rides) (A). Of the vehicles presumed stolen by professionals, 21% were recovered within 48 hours (R<48), 15% were recovered after 48 hours (R>48), and 64% were never recovered (N). Of the vehicles presumed stolen by amateurs, 44% were recovered within 48 hours, 51% were recovered after 48 hours, and 5% were never recovered. (a) Draw a tree diagram representing the data. Re48 R48 O Re48 R48 ON R48 Re48 N Rc48 R48 (b) What is the probability that a vehicle stolen by a professional in this city will be recovered within 48 hours? 65 (c) What is the probability that a vehicle stolen in this city will never be recovered? (Round your answer to four decimal places.) 69
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
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