Answer:
<h3>The soil mixtures must the scientist </h3><h3>create in order to test all possible combinations of the 10 soil types - b. 45 .</h3>
<h2>Given</h2>
<h3>Soil samples = 1. , 2. , 3. , 4. , 5. , 6. , 7. , 8. , 9. , 10 each mixture must have two</h3><h3> sample </h3>
<h2>Solution</h2>
<h3>• We have to mix 2 soils in equal amounts then , the total number of possible soil mixtures are:-</h3>
<h3>• 1 and 2 , 1 and 3 , 1 and 4 , 1 and 5 , 1</h3><h3> and 6 , 1 and 7 , 1 and 8 , 1 and 9 , 1 and</h3><h3> 10 = 9 </h3>
<h3>• 2 and 3 , 2 and 4 , 2 and 5 , 2 and 6 , 2 and 7 , 2 and 8 , 2 and 9 , 2 and 10 = 7</h3>
<h3>• 3 and 4 , 3 and 5 , 3 and 6 , 3 and 7 , 3 and 8 , 3 and 9 , 3 and 10 = 7</h3>
<h3>• 4 and 5 , 4 and 6 , 4 and 7 , 4 and 8 , 4 and 9 , 4 and 10 = 6 </h3>
<h3>• 5 and 6 , 5 and 7 , 5 and 8 , 5 and 9 , 5 and 10 = 5 </h3>
<h3>• 6 and 7 , 6 and 8 , 6 and 9 , 6 and 10 = 4</h3>
<h3>• 7 and 8 , 7 and 9 , 7 and 10 = 3 </h3>
<h3>• 8 and 9 , 8 and 10 = 2 </h3>
<h3>• 9 and 10 = 1 </h3>
<h3>9+8+7+6+5+4+3+2+1 = 45</h3>
<h2>Learn More : </h2>
<h3>
brainly.com/question/13171394</h3>
<h3># Carry On Learning</h3>
<h3>Hope its help</h3>
