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andrey2020 [161]
3 years ago
15

I need more help on percents

Mathematics
1 answer:
alexgriva [62]3 years ago
4 0
Your answer is H. 33 1/3 %. -Link
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In a city school, 60% of students have blue eyes, 55% have dark hair, and 35% have blue eyes and dark hair. What is the probabil
gulaghasi [49]

Answer:

58%

Step-by-step explanation:

This is a problem of conditional probability.

Let A represent the event that student has dark hair.

So P(A) = 55% = 0.55

Let B represents the event that student has blue eyes.

So, P(B) = 60% = 0.60

Probability that student has blue eyes and dark hairs = P(A and B) = 35% = 0.35

We are to find the probability that a randomly selected student will have dark hair, given that the student has blue eyes. Using the given formula and values, we get:

P(A|B)=\frac{P(A \cap B)}{P(B)}\\\\ P(A|B)=\frac{0.35}{0.60}\\\\ P(A|B)=0.58

Therefore, there is 0.58 or 58% probability that the student will have dark hairs, given that the student has blue eyes.

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3 years ago
In the given figure, if a:b=10:13, then /_xoy equals.​
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2x + 7 = 3x - 7

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x = 14

2x + 7 + 12y + 1 = 180

2(14) + 12y + 8 = 180

28 + 12y + 8 = 180

36 + 12y = 180

12y = 180 - 36 = 144

y = 144/12 = 12

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Step-by-step explanation:

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Find the length of the short leg of a 30-60-90 triangle if the long leg is 3cm
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Answer:

Short leg = √3 cm

Step-by-step explanation:

the opposite angle of long leg is 60°

hypotenuse : x

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short leg length (s)

Cos 60° = 1/2 = s / x = s / 2√3

s = √3

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I had this function question that I just don't understand. Can someone explain it please
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Step-by-step explanation:

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