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3 years ago

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One jar holds 16 red marbles and 4 blue marbles. A second jar holds 75 white marbles and 25 blue marbles. What is the probabilit

y that a blue marble will be drawn from both jars?

2 answers:

bezimeni [28]3 years ago

7 0

Jar 1 : 16 red, 4 blue....total = 20
P(blue) = 4/20 reduces to 1/5

jar 2 : 75 white,25 blue...total = 100
P(blue) = 25/100 reduces to 1/4

P(blue,blue) = 1/5 * 1/4 = 1/20 or 0.05 or 5%

horsena [70]3 years ago

5 0

$|\Omega|=20\cdot100=2000\\
|A|=4\cdot25=100\\\\
P(A)=\dfrac{100}{2000}=\dfrac{1}{20}$

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Step-by-step explanation:

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We know that it is a triangular pyramid and the base is a equilateral triangle. $\text{Area of triangle = } \dfrac{1}{2} \times \text{Base} \times \text{Height} ..... (1)\\$

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b) To find area of one lateral surface:

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