Total number of students surveyed = 200
Number of male students = 80
Number of female students = 200 - 80 = 120

Number of brown eyed male students = 60
Probability of a brown eyed male student = 60 / 80 = 0.75.

Since, eye color and gender are independent, this means that eye color is not affected by the gender. Thus, we expect a similar probability of brown eye for female as we had for male.

Let the number expected of brown eyed females be x, then x / 120 = 0.75.

Thus, x = 120(0.75) = 90.

Therefore, the number female students surveyed expected to be brown eyed is 90.

7 0

3 years ago

What is the length of PC?

marshall27 [118]

31 trillion kilometers or 19 trillion miles.

7 0

3 years ago

What is Sin A? Cos A? Tan A?

Katyanochek1 [597]

Answer:

See explanation

Step-by-step explanation:

$\sin A = \frac{12}{20} = \frac{3}{5} \\ \\ \cos A = \frac{16}{20} = \frac{4}{5} \\ \\ \tan A = \frac{12}{16} = \frac{3}{4}$

6 0

3 years ago

When originally purchased, a vehicle costing $23,000 had an estimated useful life of 8 years and an estimated salvage value of $

earnstyle [38]

The correct answer is:

$5,000.

Explanation:

When it is first purchased, the depreciation expense is calculated using the formula:

$\text{Depreciation expense}=\frac{\text{Cost}-\text{Salvage Value}}{\text{Useful Life}}$

The cost was $23,000; the salvage value was $3,000; and the useful life was 8 years:

$\text{Depreciation Expense}=\frac{23000-3000}{8}=\frac{20000}{8}= \$2500$

This means the value of the vehicle depreciates $2500 per year.

After 4 years, the vehicle would depreciate 2500(4) = $10,000.

This makes the new value $23000-$10000 = $13000.

Reevaluating the depreciation expense at this point, we use $13000 for the "cost" (current value), $3000 is still the salvage value, and now the total useful life was 6; we take 4 off of this, since it has already been 4 years:

$\text{Depreciation Expense}=\frac{13000-3000}{6-4}=\frac{10000}{2}= \$5000$

The depreciation expense in year 5 is $5,000.

6 0

3 years ago

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