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Anna35 [415]
2 years ago
6

A circular garden has a circumference of

Mathematics
1 answer:
hoa [83]2 years ago
8 0
It will take him 3 hours

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Answer:

The probability that can afford to spend between $800 and $900

P(800≤X≤900) = 0.6826

The percentage of that can afford to spend between $800 and $900

P(800≤X≤900) = 68 percentage

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given that the mean of the Normal distribution = $850

Given that the standard deviation of the Normal distribution =  $50

Let 'X' be a random variable in a normal distribution

Let x₁ = 800

z_{1} = \frac{x_{1}-mean }{S.D} = \frac{800-850}{50} = -1

Let x₂ =850

z_{2} = \frac{x_{2}-mean }{S.D} = \frac{900-850}{50} = 1

<u><em>Step(ii):-</em></u>

The probability that can afford to spend between $800 and $900

P(800≤X≤900) = P(-1≤Z≤1)

                         = P(Z≤1) - P(Z≤-1)

                        = 0.5 + A(1) - (0.5 - A(-1))

                        = A(1) +A(-1)

                       = 2× A(1)       (∵ A(-1) =A(1)

                      = 2 × 0.3413

                      = 0.6826

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P(800≤X≤900) = 68 percentage

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