2 years ago

Is this correct please help will mark brainliest

Mathematics

1 answer:

zlopas [31]2 years ago

4 0

Answer:

yes i believe it is correct

Step-by-step explanation:

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In a certain country, the true probability of a baby being a boy is 0.519. Among the next nine randomly selected births

yawa3891 [41]

Answer:

0.9973

Step-by-step explanation:

Given :

Probability of girl, probability of success , 1 - p = 1 - 0.519 = 0.481

1 - p = 0.481

n = 9

Probability that atleast one is girl

Usingbthe binomial probability distribution :

P(x =x) = nCx * p^x * (1 - p)^(n - x)

USing the binomial probability calculator :

p(x ≥ 1) = p(x=1) + p(x=2) + p(x=3) + p(x=4) + p(x=5) + p(x=6) + p(x=7) + p(x=8) + p(x=9)

p(x ≥ 1) = 0.9973 ( from calculator).

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3 years ago

A batch of 20 semiconductor chips is inspected by choosing a sample of 3 chips. Assume 10 of the chips do not conform to custome

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Answer:

A batch of 20 semiconductor chips is inspected by choosing a sample of 3 chips. Assume 10 of the chips do not conform to customer requirements.

a) Number of different samples = 20C3 = $\frac{20!}{3!(17!)}$ =1140

b) 2 good and one bad chip

Number of samples = 10C2 * 10C1 = 45 * 10 =450

c) 2 good 1 bad + 1 good 2 bad + 3 bad

Number of samples = 10C2 * 10C1 + 10C1 * 10C2 + 10C3

= $450+450+120=1020$

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3 years ago

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Minchanka [31]

Answer:

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Step-by-step explanation:

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2 years ago

Help ! please :D<br> i only have about 15 min >

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Answer:

First option
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I hope this helps!

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3 years ago