Lecture 13 Bernoulli’s Formula. The Most Probable Number of Occurrences of an Event If n
What is the probability of the drawn ball being blue?
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proba.Lecture 13
Bu səhifədəki naviqasiya:
8 blue and 7 red balls it contained prior to replacement; one ball replaced from the second box.
What is the probability of the drawn ball being blue?
Solution. Let
A
be the event of drawing a blue ball. After a ball was drawn from the second
box and placed into the first
, two collections of balls have turned out in the first box:
8 blue and 7 red balls it
contained prior to replacement
;
one ball replaced from the second box.
The probability of appearance of a blue ball belonging to the first collection is
and from the second collection
, .
The probability that he randomly drawn ball belongs to the first collection is and to the second, .
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