There are seven pairs of black shoes and 5 pairs of white shoes .Tey all are put into a box and shoes are drawn at a time.To ensure that at leat one pair of black shoes are taken out,What is the minimum number of shoes required to be drawn out so as to get at leat 1 pair of correct shoes.
Choose the correct choice
A) 13 B) 14 C) 15 D) 16 E) 17
All the one sided (assume only left) white shoes, total draws required: 5   All the one sided (assume only left) black shoes, total draws required: 7   So, total draws are: 5+7= 
<gadget id="calculator">5+7</gadget>
<output>12</output>
12   Next draw or 13th draw will contain any color right footed shoe, i.e. making at least one correct pair.   So, minimum number of shoes required to be drawn out is: 13   13NSWER:13
<result>A</result>
There are seven pairs of black shoes and 5 pairs of white shoes .Tey all are put into a box and shoes are drawn at a time.To ensure that at leat one pair of black shoes are taken out,What is the minimum number of shoes required to be drawn out so as to get at leat 1 pair of correct shoes.