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dusya [7]
3 years ago
12

In a recent survey of favorite sodas 7 students chose coke. If these students represent 17.5% of the students surveyed, how many

students were surveyed in all?
Mathematics
1 answer:
katovenus [111]3 years ago
8 0

Answer:

40

Step-by-step explanation:

7 = 17.5% × Y

STEP 2 7 =

17.5

100

× Y

Multiplying both sides by 100 and dividing both sides of the equation by 17.5 we will arrive at:

STEP 3 Y = 7 ×

100

17.5

STEP 4 Y = 7 × 100 ÷ 17.5

STEP 5 Y = 40

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Temka [501]

Answer:

So, the probability  that a randomly selected Korean driver will take two or more non-home-based trips per day is P=0.32.

Step-by-step explanation:

We know that the number of non-home-based trips per day taken by drivers in Korea was modeled using the Poisson distribution with λ = 1.15.

We have the Poisson formula:

P(X=k)=\frac{\lambda^k\cdot e^{-\lambda}}{k!}

We calculate:

P(X\geq 2)=1-P(X=0)-P(X=1)\\\\P(X\geq 2)=1-\frac{1.15^0\cdot e^{-1.15}}{0!}-\frac{1.15^1\cdot e^{-1.15}}{1!}\\\\P(X\geq 2)=1-0.32-0.36\\\\P(X\geq 2)=0.32

So, the probability  that a randomly selected Korean driver will take two or more non-home-based trips per day is P=0.32.

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3 years ago
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Answer:

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Step-by-step explanation:

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6 0
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(=-27) because that’s the end answer
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