There are 20 balls of green color,20 balls of red color,20 balls of blue color,20 of balck,20 of yellow. how many u have to pick to guarantee 2pairs of same color?
Choose the correct choice.
A) 2 B) 3 C) 4 D) 5 E) 6
Here we have five different colours.(Red, Green, Black, Blue and Yellow)   Consider If we pick 1st ball as red. After that, there may be a chance to pick FOUR different colours of ball.   But, if we pick the 6th ball, it must be match any one of the colour ball.   So for guarntee the same pair of colur balls, we pick 6 balls.   ANSW6R:6
<result>E</result>
There are 20 balls of green color,20 balls of red color,20 balls of blue color,20 of balck,20 of yellow. how many u have to pick to guarantee 2pairs of same color?