The best and most correct answer among the choices provided by your question is the second choice or letter B which is "<span>b3- 3b2 + 2b ways."
</span><span>There are b choices for the first book, b-1 for the second, and b-2 for the third So multiply b(b-1)(b-2) to get your answer</span>
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Once it is rearranged it would be inverse.
y = k/x is the inverse variation equation.
y = 0.3/x
0.3 is the constant of variation
There are 10 girls in the class. You want to multiply (3/5)x25, once product is found, you subtract it from 25, the product is 15, so 25-15=10girls