# Inflation

Once upon a time, tsar owned a money printer and printed and printed. The result of printing money prices went up,in the first year 3.9 %, in the second 6%, in the third 4.7% and in the fourth 5.5%.

Then tsar was failed in election.

Calculate the average annual inflation rate (percentage of price increase) during this four years.

i =  5 %

### Step-by-step explanation:

$i=100\left(\sqrt[4]{\left(1+\frac{3.9}{100}\right)\left(1+\frac{6}{100}\right)\left(1+\frac{4.7}{100}\right)\left(1+\frac{5.5}{100}\right)}-1\right)=5\mathrm{%}$

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