Confused on this particular problem

qrosh

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May 25, 2015
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A surveyfinds that 110 people ate breakfast and 30 people skipped breakfast. Of thosewho ate breakfast, 10 people felt tired. Of those who skipped breakfast, 10people felt tired.

  1. Make a two way table that shows theconditional frequencies based on breakfast total. (Make sure you have the“joint” and “marginal” frequency also the “joint relative” and “marginalrelative” frequency)
  2. From the table, what is theprobability of getting someone who eats breakfast and is tired?
 
A surveyfinds that 110 people ate breakfast and 30 people skipped breakfast. Of thosewho ate breakfast, 10 people felt tired. Of those who skipped breakfast, 10people felt tired.

  1. Make a two way table that shows theconditional frequencies based on breakfast total. (Make sure you have the“joint” and “marginal” frequency also the “joint relative” and “marginalrelative” frequency)
  2. From the table, what is theprobability of getting someone who eats breakfast and is tired?

What are your thoughts?

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Beyond confused for this particular problem. Did not learn the full lesson. Please need serious help.
 
Expand (x+3y)^7

[FONT=MathJax_Math]x[/FONT][FONT=MathJax_Main]7[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]21[/FONT][FONT=MathJax_Math]x[/FONT][FONT=MathJax_Main]6[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]189[/FONT][FONT=MathJax_Math]x[/FONT][FONT=MathJax_Main]5[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]2[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]945[/FONT][FONT=MathJax_Math]x[/FONT][FONT=MathJax_Main]4[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]3[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]2835[/FONT][FONT=MathJax_Math]x[/FONT][FONT=MathJax_Main]3[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]4[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]5103[/FONT][FONT=MathJax_Math]x[/FONT][FONT=MathJax_Main]2[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]5[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]5103[/FONT][FONT=MathJax_Math]x[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]6[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]2187[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]7[/FONT]

Am well aware this is the final answer. What exactly are the steps to getting it?
 
Beyond confused for this particular problem. Did not learn the full lesson. Please need serious help.
Unfortunately, we cannot here provide the hours of missing classroom instruction. Instead, please consider studying online lessons, or else hiring a qualified local tutor who can provide you with the individualized lessons you have requested.

Good luck! ;)
 
[FONT=MathJax_Math]x[/FONT][FONT=MathJax_Main]7[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]21[/FONT][FONT=MathJax_Math]x[/FONT][FONT=MathJax_Main]6[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]189[/FONT][FONT=MathJax_Math]x[/FONT][FONT=MathJax_Main]5[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]2[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]945[/FONT][FONT=MathJax_Math]x[/FONT][FONT=MathJax_Main]4[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]3[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]2835[/FONT][FONT=MathJax_Math]x[/FONT][FONT=MathJax_Main]3[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]4[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]5103[/FONT][FONT=MathJax_Math]x[/FONT][FONT=MathJax_Main]2[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]5[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]5103[/FONT][FONT=MathJax_Math]x[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]6[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]2187[/FONT][FONT=MathJax_Math]y[/FONT][FONT=MathJax_Main]7[/FONT]

Am well aware this is the final answer. What exactly are the steps to getting it?
(a+b)^7 will have the following 8 times with the number in front of them missing (for now).
(a^7)(b^0) + (a^6)(B^1) + (a^5)(b^2) + (a^4)(b^3) + ... (a^1)(b^6) + (a^0)(b^7) .
To get the numbers (coefficients) in front of each term you use the '7th' row of pascals triangle.
Just replace a with x and b with 3y.
 
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