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lana [24]
2 years ago
14

A urn contains 3 red and 5 black balls. Tom first withdraws a ball from the urn and Mary withdraws a ball from the urn without r

eplacement. They keep withdrawing a ball alternately until a red ball is selected. Find the probability that Tom selects the red ball.
a) 3/8
b) 15/64
c) 31/56
d) 48/64
e) 34/56
Mathematics
2 answers:
Papessa [141]2 years ago
6 0

Answer:

The answer is B

Step-by-step explanation:

I learned this from my math teacher

hichkok12 [17]2 years ago
6 0

Answer:

the probability that Tom selects the red ball is probably 15/64, which is b

Step-by-step explanation:

trust me, i did it before

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Well, it is a good and interesting question

Such areas could be calculated in a single shoot and also by dividing the whole shape into other shapes and the total area would be the sum of these areas

I prefer the way of a single shoot ...

The figure represents a trapezoid:
its lower base = 21 units
its upper base = 12 units
the normal height between them = 8 units

NOW

The area of a trapezoid = [(sum of bases' lengths) ÷ 2] * height
                                       = [(12 + 21) ÷ 2] * 8 = 132 sq units


Hope that helps
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3 years ago
What are the zeros of the function f(x) = x2 + 8x + 4, expressed in simplest radical form? x = –4 ± 2StartRoot 3 EndRoot x = –4
SCORPION-xisa [38]

Answer:

<h2>x = -4 ± 2√(3)  </h2><h2 />

Step-by-step explanation:

Discriminant Δ = √(8²-4×(1)×(4)) = √(48) = √(4×12) = √(4)×√(12) = 2√(12)

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Read 2 more answers
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Answer:

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