a box contains 12ball of which some are red in colour. if 16more red ball are put in the box and a ball is drawn a red ball doubles than what it was before. find the no of red balls in the bag
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let the red balls initially be x
probability = x/12
after 6 red balls have been added, probability becomes (6+x)/18.
now according to the question it becomes twice the initial value.
(6+x)/18 = 2*x/12
solving this we get x = 3.
initially there were 3 red balls.
probability = x/12
after 6 red balls have been added, probability becomes (6+x)/18.
now according to the question it becomes twice the initial value.
(6+x)/18 = 2*x/12
solving this we get x = 3.
initially there were 3 red balls.
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