The number of permutations of the 4 different letters, taken two at a time, is given by:
My solution to the problem is as follows:
Just multiply the number of each choice:
<span>6*3*2= 36
</span>
Therefore, there are 36 ways of choosing a book.
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Formula for finding percent change (increase or decrease) is amount of the change divided by the original amount.
Here, the amount of the change is 50 and the original amount is 250.
50/250= 0.2
Multiply by 100 to get percent.
20% decrease (because budget went down)
