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malfutka [58]
3 years ago
5

A local veterinary clinic typically sees 15% of its horses presenting with West Nile virus. If 10 horses are admitted during Jul

y, what is the probability that two or fewer horses among the 10 horses admitted have been infected with West Nile virus?
A. 0.3874
B. 0.3487
C. 0.1937
D. 0.8202
Mathematics
1 answer:
NemiM [27]3 years ago
6 0

Answer: D. 0.8202

Step-by-step explanation:

We would assume a binomial distribution for the number of horses presenting with West Nile virus. The formula is expressed as

P(x = r) = nCr × p^r × q^(n - r)

Where

x represent the number of successes.

p represents the probability of success.

q = (1 - p) represents the probability of failure.

n represents the number of trials or sample.

From the information given,

p = 15% = 15/100 = 0.15

q = 1 - p = 1 - 0.15

q = 0.85

n = 10

Therefore,

P(x ≤ 2) = P(x = 0) + P(x = 1) + P(x = 2)

P(x = 0) = 10C0 × 0.15^0 × 0.85^(10 - 0) = 0.1969

P(x = 1) = 10C1 × 0.15^1 × 0.85^(10 - 1) = 0.3474

P(x = 2) = 10C2 × 0.15^2 × 0.85^(10 - 2) = 0.2759

P(x ≤ 2) = 0.1969 + 0.3474 + 0.2759

= 0.8202

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3.28×3=9.84 why is this
-Dominant- [34]
3.28·3 = 9.84 is the same as:
3.28+3.28+3.28 = 9.84

Hope this helped! Good luck!
5 0
3 years ago
Estimate : 1) 48% of 8 2) 3% of 119 3) 26% of 32 4) 76% of 280
zaharov [31]
1) 48% of 8=3.84 
2) 3% of 119=3.57
3) 26% of 32=8.32
4) <span>76% of 280=212.8

Hope this helps ya!</span>
7 0
3 years ago
On a coordinate plane, parallelogram R S T U has points (negative 4, 4), (2, 6), (6, 2), and (0, 0). What is the area of paralle
Ad libitum [116K]

Answer:

The area of the parallelogram is;

32 square units

Step-by-step explanation:

The given parameters are;

The coordinates of the parallelogram RSTU = R(-4, 4), S(2, 6), T(6, 2), and U(0, 0)

We note that the area of a parallelogram = Base length × Height

From the drawing of the parallelogram RSTU, we have;

The base length = The length of \overline {TU} = The length of \overline {SR} = √((2 - (-4))² + (6 - 4)²) = 2·√10

The height of a parallelogram is perpendicular to its base length = The line \overline {VT}

∴ Where, the slope of the base length = m, the slope of the height = -1/m

The slope, 'm' of \overline {SR} = (6 - 4)/(2 - (-4)) = 1/3

Therefore, the slope of the height = -1/(1/3) = -3

We note that a point on the height is the point 'T', therefore, the equation of the line in point and slope form is therefore;

y - 0 = -3·(x - 0)

∴ y = -3·x

Therefore, the coordinates of the point 'V' is given by the simultaneous solution of the equations of \overline {SR} and \overline {VT}

The equation of the line \overline {SR} in point and slope form from the point 'R' and the slope 'm = 1/3' is given as follows;

y - 4 = (1/3) × (x - (-4)) = (1/3) × (x + 4)

y = x/3 + 4/3 + 4 = x/3 + 16/3

y = x/3 + 16/3

We then have the coordinate at the point 'V' (x, y) is given as follows;

-3·x = x/3 + 16/3

-9·x = x + 16

-10·x = 16

x = -16/10 = -1.6

x = -1.6

∴ y = -3·x = -3 × -1.6 = -4.8

y = 4.8

The coordinate at the point, V = (-1.6, 4.8)

The length of the line \overline {VT} = The height of the parallelogram = √((-1.6 - 0)² + (4.8 - 0)²) = 8/5·√10

The height of the parallelogram = 8/5·√10

The area of the parallelogram, A = Base length × Height

∴ A = 2·√(10) × 8/5·√(10) = (16/5) × 10 = 32

The area of the parallelogram, A =  32 square units.

6 0
3 years ago
Read 2 more answers
Complete the table of values for the linear relation y = -5x + 10.
musickatia [10]

the answer will be -5

Step-by-step explanation:

because you have to minus 5 and 10

so the answer will be x =- 5

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3 years ago
On a math test, 5 out of 20 students got an A. If three students are chosen at random without
Leya [2.2K]

Answer: B-3/400

Step-by-step explanation:

8 0
3 years ago
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