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defon
3 years ago
10

12 yellow balls and 7 red balls are placed in an urn. two balls are then drawn in succession without replacement. what is the pr

obability that the first ball drawn is a red ball if the second ball drawn is yellow?
Mathematics
1 answer:
xxMikexx [17]3 years ago
6 0

Total number of balls = 12 + 7 = 19


p(first ball is a red) = 7/19


Answer: 7/19

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garik1379 [7]

Answer:

(a)2(89x+84)

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Step-by-step explanation:

The dimensions of the larger rectangular field are:

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From Part (a),

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Area of the Semicircular Fountain =\dfrac{\pi r^2}{2} =\dfrac{\pi (2x)^2}{2} =\dfrac{4x^2\pi}{2} =2x^2\pi

Area of the Field that does not include the soccer  field or the fountain.

=Area of the larger rectangular field - Area of the Soccer Field-Area of the Semicircular Fountain

=178x+168-2x^2\pi\\=2(89x+84-x^2\pi)

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Check the picture below.

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Step-by-step explanation:

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