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3 years ago

13

A scale drawing of a city has an area of 100 inches. Each inch on the drawing represents 2 miles. What is the area of the city?

Enter you answer in the box. mi2

1 answer:

Free_Kalibri [48]3 years ago

5 0

Answer:

200 miles

Step-by-step explanation:

100 x 2

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In a certain college, 33% of the math majors belong to ethnic minorities. If 7 students are selected at random from the math maj

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Answer: a) 0.996, b) 0.253, c) 0.02.

Step-by-step explanation:

Since we have given that

Probability of success = Probability of the math majors belong to ethnic minorities = 33% = 0.33 =p

Probability of failure = q = 1-0.33 = 0.67

Number of students selected = 7

a) No more than 5 belong to an ethnic minority

So, using "binomial distribution", we get that

$P(X\leq 5)=\sum^5 _{x=0} ^5C_x(0.33)^x(0.67)^{5-x}=0.996$

b. Exactly three of them belong to an ethnic minority

So, it becomes,

$P(X=3)=^7C_3(0.33)^3(0.67)^4=0.253$

c. None of them belong to an ethnic minority

$P(X=0)=^7C_0(0.33)^0(0.67)^7=0.02$

Hence, a) 0.996, b) 0.253, c) 0.02.

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Why must the compass point be placed on the points where the arc intersects with the original line?

PIT_PIT [208]

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