Question

In an urn are 13 balls, which are numbered from 1 to 13. It is randomly taken a ball.

We define the following events:

A: An even number will be drawn.

B: A number divisible by 3 is drawn.

C: a number divisible by 4 is drawn.

Give the following probabilities.

P (A) =

(| B A) = P

P (A | C) =

P (B) =

P (B | A) =

P (B | C) =

P (C) =

P (C | A) =

(| B C) = P

Answer #1

Conditional probability P(A/B) is the probability of event A when event B is already happened .

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as fractions.)
(a) The ball is red, given that it is numbered 1. - answer
1/2
(b) The ball is green, given that it is numbered 7. - answer
1
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(c) What is the probability that the sum is greater than 10 and
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Outocme
x
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ping pong ball is drawn at random from an urn consisting of
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Let x be the amount of money a player will win/lose when playing
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1
to
8
are placed in a bag.
Some of the balls are grey and some are white.
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4
, and
6
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1
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2
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5
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7
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8
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A ball will be selected from the bag at random.
The
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Note that each outcome has the same probability.
1
2
3
4
5
6
7
8...

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