Question 1202745
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<font color=red>Answer</font>
<table border = "1" cellpadding = "5"><tr><td></td><td>White</td><td>Black</td><td>Total</td></tr><tr><td>Less than 3 yrs</td><td>16</td><td>12</td><td>28</td></tr><tr><td>3 yrs or older</td><td>34</td><td>18</td><td>52</td></tr><tr><td>Total</td><td>50</td><td>30</td><td>80</td></tr></table>



Explanation:



We have these given facts<ol><li>There is a total of 80 sheep</li><li>with 28 being aged under 3 years</li><li>and 30 sheep in total are black. </li><li>There are 34 white sheep aged 3 years or more.</li></ol>Fact 1 will mean 80 goes in the bottom right corner. 
This is the grand total.


Fact 2 says that "28" goes at the end of the first row.
Then we combine facts 1 and 2 so we can determine the missing value in the final column is 80-28 = 52.


Fact 3 is then used to write "30" at the bottom of the second column. 
The total for the other column must be 80-30 = 50 (when combining facts 1 and 3).
There are 50 white sheep and 30 black sheep to have 50+30 = 80 total.


Fact 4 then is used to write "34" just above the 50 we wrote earlier. 
The remaining white sheep count is 50-34 = 16.


There are 16 white sheep aged less than 3 yrs, and 28 sheep of this age group. The remaining sheep of this age group must be 28-16 = 12.


The final slot must be 18 because either
30-12 = 18
or
52-34 = 18


Let me know if you have further questions.
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