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lubasha [3.4K]
2 years ago
7

Metro buses are scheduled to arrive at each stop every 30 minutes. If the time a person waits at a bus stop is uniformly distrib

uted and the maximum possible wait time for a bus is 30 minutes, what is the probability that you will wait more than 25 minutes for a bus
Mathematics
1 answer:
Nutka1998 [239]2 years ago
4 0

Answer:

The probability is P(X > 25 )  =  1.667

Step-by-step explanation:

From the question we are told that

    The  maximum wait is  b  = 30 \ minutes

      The  minimum wait would be  a =  0\  minutes

Generally the probability that you will wait more than 25 minutes for a bus is mathematically represented as

   P(X > 25 )

Now given that the time a person waits is uniformly distributed and that the maximum is  30 then we can evaluate the above probability as

    P(X > 25 ) =  P(25 <  X  <  30 ) =  \frac{30 - 25}{30 -  0}

     P(X > 25 )  =  1.667

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<span>The side b is opposite to the angle B, applying the law of the sines, we have:

</span>\frac{a}{sinA} = \frac{b}{sinB}
\frac{20}{sin30^0} = \frac{b}{sin45^0}
\frac{20}{ \frac{1}{2} } = \frac{b}{ \frac{ \sqrt{2} }{2} }
20* \frac{ \sqrt{2} }{2}  = b* \frac{1}{2}
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6 0
2 years ago
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Un globo busca aterrizar en medio de dos ciudades A y B, cuya distancia entre si es de 200 km. Si se mide el ángulo de elevación
scoundrel [369]

Answer:

h \approx 59.898\,km

Step-by-step explanation:

El diagrama trigonométrico que representa el enunciado es incluido abajo como adjunto. Las siguientes relaciones trigonométricas describen la localización del globo. (The trigonometric diagram representing the statement is included below as attachment. The following trigonometric relations describes the location of the balloon):

\tan 27^{\circ} = \frac{h}{x}

\tan 36^{\circ} = \frac{h}{200-x}

A continuación, se obtiene la distancia horizontal: (The horizontal distance is obtained hereafter):

x \cdot \tan 27^{\circ} = (200-x)\cdot \tan 36^{\circ}

x \cdot (\tan 27^{\circ} + \tan 36^{\circ})= 200\cdot \tan 36^{\circ}

x = \frac{200\cdot \tan 36^{\circ}}{\tan 27^{\circ}+ \tan 36^{\circ}}

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La altura aproximada del globo es (The approximated height of the globe is):

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7 0
2 years ago
There are three choices of jellybeans - grape ,cherry and orange. if the probability of getting a grape is 3/10 and the probabil
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When looking at probabilities, two ideas are always true.

1) Any probability is more than 0.

2) The sum of all the probabilites is 1.

Idea #2 works here. (For example, think of how a die has six things and the probability of each is 1/6. So 1/6 + 1/6 + 1/6 + 1/6 + 1/6 + 1/6 = 1.) Let G = the probability of grape, C = probability of cherry and O = the probability of orange. From Idea #2, G + C + O = 1. Since we know G and C, then

3/10 + 1/5 + O = 1.

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2 years ago
Lindsey bought a picnic basket originally priced at $40 but on sale for 50% off. After 10% sales tax, what was the total cost?
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Answer:

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Hence the total cost is

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7 1
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Hello!

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