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77julia77 [94]
3 years ago
11

Two classes are planning to go on a field trip together. One clas with 18 students is being joined by 6 boys and 11 girls from a

nother class, giving an overall ratio of boys to girls on the field trip of 2 to 3. Boys made up what proportion of the original class?
Mathematics
1 answer:
Serjik [45]3 years ago
7 0

Answer: The boys made up 6b of the original class.

Step-by-step explanation:

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A refrigerator box measures 11 feet by 6 feet by 6 feet Sam decides to fill up the box three-fourths with trash how much space w
IRINA_888 [86]

Answer:

297 feet

Step-by-step explanation:

11 × 6 × 6 = 396

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A new medical test provides a false positive result for hepatitis 2% of the time that is a perfectly healthy subject being teste
Oxana [17]
Given that X <span>be the number of subjects who test positive for the disease out of the 30 healthy subjects used for the test.

The probability of success, i.e. the probability that a healthy subject tests positive is given as 2% = 0.02


Part A:

</span><span>The probability that all 30 subjects will appropriately test as not being infected, that is the probability that none of the healthy subjects will test positive is given by:

</span>P(X)={ ^nC_xp^x(1-p)^{n-x}} \\  \\ P(0)={ ^{30}C_0(0.02)^0(1-0.02)^{30-0}} \\  \\ =1(1)(0.98)^{30}=0.5455
<span>

Part B:

The mean of a binomial distribution is given by

</span>\mu=np \\  \\ =30(0.02) \\  \\ =0.6
<span>
The standard deviation is given by:

</span>\sigma=\sqrt{np(1-p)} \\ \\ =\sqrt{30(0.02)(1-0.02)} \\ \\ =\sqrt{30(0.02)(0.98)}=\sqrt{0.588} \\  \\ =0.7668
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Part C:

This test will not be a trusted test in the field of medicine as it has a standard deviation higher than the mean. The testing method will not be consistent in determining the infection of hepatitis.</span>
5 0
3 years ago
Order these decimals form greatest to least 3.6; 0.36; 36; 0.036
aliina [53]
36, 3.6, 0.36, 0.036 is the order
4 0
3 years ago
Read 2 more answers
What gives humans a particular advantage over other species in the use of<br> commons?
Artemon [7]

Answer:

Humans have technology

Step-by-step explanation:

4 0
3 years ago
What is the slope of the line (-2,-6) and (2,2)
avanturin [10]

Answer:

slope = 2

Step-by-step explanation:

Calculate the slope m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

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m = \frac{2+6}{2+2} = \frac{8}{4} = 2

4 0
3 years ago
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