One sales man sold one box out of them and then he says, "I
have the same number of red balls left
out as that of blue."
Which box is the one he solds out?
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Answer Posted / guest
Total no of balls = 5 + 7 + 14 + 16 + 18 + 29 = 89
Total number of balls are odd. Also, same number of red
balls and blue balls are left out after
selling one box. So it is obvious that the box with odd
number of balls in it is sold out i.e. 5, 7
or 29.
Now using trial and error method,
(89-29) /2 = 60/2 = 30 and
14 + 16 = 5 + 7 + 18 = 30
So box with 29 balls is sold out.
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