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3 years ago

g If A and B are disjoint events, with P( A) = 0.20 and P( B) = 0.30. Then P( A and B) is: a. .00 b. .10 c. .50 d. 0.06

Mathematics

1 answer:

Lostsunrise [7]3 years ago

8 0

Answer: A) 0

P(A and B) = 0 when events A and B are disjoint, aka mutually exclusive.

We say that two events are mutually exclusive if they cannot happen at the same time. An example would be flipping a coin to have it land on heads and tails at the same time.

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HELP NEEDED!!!! MUCH APPRECIATED

jeka94

We have

$t_1 + t+2 = \dfrac{\sqrt{s}}{4} + \dfrac{s}{1100} = .5$

Multiplying through by 1100,

$275 \sqrt{s} + s = 550$

$275 \sqrt{s} = 550 - s$

Squaring (which means we need to check later),

$275^2 s = (550 - s)^2 = 550^2 - 1100 s + s^2$

$0 = s^2 - (1100 + 275^2) s + 550^2$

$0 = s^2 - 76725 s + 302500$

$s = \frac 1 2 (76725 \pm 1375 \sqrt{3113} )$

$s \approx 3.94285 \textrm{ or } s \approx 76721.0571$

Clearly there's no way that giant number would work; must be extraneous.

Answer: 3.94

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Answer:

28,436,297,825

30,943,267,101

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Step-by-step explanation:

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