Question 1129385
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<pre>
The probability under the question is equal to the ratio of the areas, which is, in turn, {{{1-1/4}}}.


<U>Answer</U>.  {{{3/4}}}.
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Notice, it is not necessary for the circles to be concentric to get the same answer.


It is enough that the ratio of radii is {{{1/2}}} and the smaller circle is entirely inside the larger one.