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cestrela7 [59]
3 years ago
8

A bag has five red marbles, six blue marbles, and four black marbles. What is the probability of picking a blue marble, replacin

g it, and then picking a black marble?
Mathematics
2 answers:
sweet-ann [11.9K]3 years ago
8 0
5+6+4=15
blue marble = 6 out of 15
replacing blue marble for black = 4 out of 14
Nezavi [6.7K]3 years ago
6 0
P(blue) = 6/15
P(black) = 4/15
P(blue\ then\ black)=\frac{6}{15}\times\frac{4}{15}=\frac{8}{75}
The required value of probability is 8/75.
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<h3>How to factor equation?</h3>

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let's expand the equation

Therefore,

4a⁴b² - 21a²b + 5 = 0

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Rearrange the equation

4a⁴b² - a²b  - 20a²b + 5 = 0

Let's factorise the equation

4a⁴b² - a²b  - 20a²b + 5 = 0

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