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elizebeth4501
05.02.2021 •
Mathematics
Consider three urns, one colored red, one white, and one blue. The red urn contains 1 red and 4blue balls; the white urn contains 3 white balls, 2 red balls, and 2 blue balls; the blue urn contains4 white balls, 3 red balls, and 2 blue balls. At the initial stage, a ball is randomly selected fromthe red urn and then returned to that urn. At every subsequent stage, a ball is randomly selectedfrom the urn whose color is the same as that of the ball previously selected and is then returnedto that urn. (1) In the long run, what proportion of the selected balls are red
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Ответ:
49.7![cm^{2}](/tpl/images/2180/4517/82289.png)
Step-by-step explanation:
Although it is hidden a bit, we are actually given the circumference of the circle, which is 25 cm.
We know that C = 2πr, so we can substitute variables to find the radius (r).
25 = 2πr
r = 25/(2π)
r = 3.9788... cm
The area of a circle is A = π
, so:
A = π![3.9788^{2}](/tpl/images/2180/4517/d85cb.png)
A = 49.7359...![cm^{2}](/tpl/images/2180/4517/82289.png)
A ≈ 49.7![cm^{2}](/tpl/images/2180/4517/82289.png)