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guapka [62]
3 years ago
9

Two way Frequency table question

Mathematics
1 answer:
lapo4ka [179]3 years ago
7 0
Answer: choice A

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Work Shown:

P(TV) = (number who watch tv)/(number total)
P(TV) = 30/100
P(TV) = 0.30

P(Girl) = (number of girls)/(number total)
P(Girl) = 55/100
P(Girl) = 0.55

P(TV)*P(Girl) = 0.30*0.55 = 0.165 which rounds to 0.17
We'll use this value later. So let's call this M = 0.17

Look in the "girl" row and "tv" column. The value 17 is here.
This is out of 100 people total, so
P(TV and Girl) = 17/100 = 0.17
Call this value N = 0.17

Because M = N = 0.17 approximately, this means that the two variables "TV" and "Girl" are approximately independent

So the equation P(TV and Girl) = P(TV)*P(Girl) is approximately true in this example.

This points to choice A being the answer.

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dangina [55]
Answer=7:13

Kenny's Weight*6/7=Melvin's Weight

So, for example, if Melvin's weigh was 7...

Kenny's Weight*6/7=7
divide both sides by 6/7
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So we can say that Melvin's weight to Kenny's weight is 7:6

The boys total weights would be...
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So Melvin's weight over the total weight of the two boys is:

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4 0
3 years ago
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Ray Of Light [21]
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Use that future value to find the present value at a rate 8% compounded annually
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Answer:

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Step-by-step explanation:

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f(x) = (1/4)^x

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Either use exponents rules:

= 1^3 / 4^3

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or just use the meaning of exponents

= 1/4 × 1/4 × 1/4

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Plug into calculator...
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