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Nana76 [90]
3 years ago
10

What is the perimeter of rectangle HIJK

Mathematics
2 answers:
jeyben [28]3 years ago
8 0
The perimeter is:

7+6+7+6 = 26
olga nikolaevna [1]3 years ago
5 0
The perimeter is 26

hope this helps! :)
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Given that:

Mean =135

standard deviation = 12

sample size n  = 50

sample mean \overline x = 140

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Then,

X \sim N ( \mu \sigma)

The probability that X is greater than 140 is :

P(X>140) = 1 - P(X ≤ 140)

P(X>140) = 1 - P( \dfrac{X-\mu}{\sigma} \leq \dfrac{140-135}{12})

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Similarly, let consider Y to be the variable that follows a binomial distribution of the no of household whose expense is greater than $140

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Y \sim Binomial (50,0.3372)

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P(Y ≥ 15) = 1 - ( P(Y=0) + P(Y=1) + P(Y=2) + ... + P(Y=14) )

P(Y \geq 15) = 1 - \begin {pmatrix} ^{50}_0 \end {pmatrix} (0.3372)^0 (1-0,3372)^{50} + \begin {pmatrix} ^{50}_1 \end {pmatrix} (0.3372)^1 (1-0,3372)^{49}  + \begin {pmatrix} ^{50}_2 \end {pmatrix} (0.3372)^2 (1-0,3372)^{48} +...  + \begin {pmatrix} ^{50}_{50{ \end {pmatrix} (0.3372)^{50} (1-0,3372)^{0}

P(Y ≥ 15) = 0.763

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3 years ago
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