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Oksana_A [137]
3 years ago
9

What does this mean???? Please help

Mathematics
1 answer:
Luden [163]3 years ago
5 0
This mean Algebra A
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If A and B are independent events with P(A) = .5 and P(B) = .2, find the following:a) P(A U B)b) P(A^c ? B^c)c) P(A^c U B^c)**No
Effectus [21]

If A and B are independent, then P(A\cap B)=P(A)P(B).

a.

P(A\cup B)=P(A)+P(B)-P(A\cap B)=P(A)+P(B)-P(A)P(B)

P(A\cup B)=0.5+0.2-0.5\cdot0.2

\boxed{P(A\cup B)=0.6}

b. I'm guessing the ? is supposed to stand for intersection. We can use DeMorgan's law for complements here:

P(A^c\cap B^c)=P(A\cup B)^c=1-P(A\cup B)

P(A^c\cap B^c)=1-0.6

\boxed{P(A^c\cap B^c)=0.4}

c. DeMorgan's law can be used here too:

P(A^c\cup B^c)=P(A\cap B)^c=1-P(A\cap B)=1-P(A)P(B)

P(A^c\cup B^c)=1-0.5\cdot0.2

\boxed{P(A^c\cup B^c)=0.9}

4 0
2 years ago
Assume that 6 people, including. the husband and wife pair, apply for 5 sales positions. People are hired at random. What is the
Dvinal [7]
Probability that one is hired ans one not:
P ( A ) = (2 C 1 * 4 C 4) / 6 C 5 =
= ( 2 * 1 ) / 6 = 2/9 = 1 / 3
Answer: 1/3  or  33.33% 
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3 years ago
What is speed of sound in air at 100 degree celcius?​
Ad libitum [116K]

Answer:

386m/s is the answer to your question

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Answer: tens

Step-by-step explanation: after ones comes tens, before ones comes decimal point

7 0
3 years ago
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Will mark as brainliest if correct
Alenkinab [10]

Answer:

x = 2

Step-by-step explanation:

9^2 or 9(9) = 81

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3 years ago
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