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thnguyen0720
22.07.2020 •
Mathematics
John wants to nail a thumbtack on his circular board, pictured below. If the thumbtack is equally likely to be placed anywhere on the board, what is the probability that the thumbtack will be placed on the inner circle? Use 3.14 for , and round your answer to the nearest whole percent. A. 51% B. 55% C. 57% D. 60%
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Ответ:
Step-by-step explanation:
Given
Radius of inner circle = 5ft
Radius of outer circle = 7ft
Required
Determine the probability that the thumbtack will be placed on the inner circle
We start by calculating the area of both circles;
Inner Circle
Outer Circle
At this point, the probability can be calculated;
The probability = Area of Inner Circle / Area of Outer Circle
Convert to percentage
Approximate
Ответ:
wassu
Step-by-step explanation: