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3 years ago

7

The height of certain banner is equal to one third of its length, If the banner is 5 feet tall, write an equation that can be us

ed to find the banner’s length, L, in feet

1 answer:

Ludmilka [50]3 years ago

3 0

5÷3=length

5 is the length of the banner and you need to know the length. You already know that the length is 1/3 of the width (5).

1.7 feet

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In a certain country, the true probability of a baby being a girl is 0.469. Among the next seven randomly selected births in th

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Let X represents the event of baby girl,

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So, the probability of a baby who is not a girl is, q = 1 - 0.469 = 0.531,

Also, the total number of experiment, n = 7

Thus, by the binomial distribution formula,

$P(x)=^nC_x(p)^x q^{n-x}$

Where, $^nC_x=\frac{n!}{x!(n-x)!}$

The probability that all babies are girl or there is no baby boy,

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Hence, the probability that at least one of them is a boy = 1 - P(X=7)

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= 0.995008743382

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