Question 1135309
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<pre>
Let x be the number of males puppies.


Then the condition says


    {{{x/(x+6)}}} = {{{1/4}}}.


It implies


    4x = x + 6,

    3x = 6

    x = {{{6/3}}} = 2.      <U>ANSWER</U>


<U>CHECK</U>.   The probability is  {{{2/(6+2)}}} = {{{2/8}}} = {{{1/4}}}.    ! Correct !
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Solved.