A box contains 12 balls of which some are red in colour. If 6 more red balls are put in
the box and a ball is drawn at random, the probability of drawing a red ball doubles
than what it was before. Find the number of red balls in the bag.
Answers
Answered by
3
Let number of red balls be = x
P(red ball) = x/12
If 6 more red balls are added:
The number of red balls = x + 6
P(red ball) = (x+6)/18
Since, (x+6)/18 = 2(x/12)
x = 3
Therefore, there are 3 red balls in the bag.
anandsharma9982:
why you added 2x/12
Answered by
0
Step-by-step explanation:
AnswEr:
Given
Total Number of Balls in box = 12
Let us Consider that Red ball be
Probability of red balls drawing -
If 6 more red balls are put in the box,
Then, Total Number of Balls = 12 + 6
Total Number of Red Balls = x + 6
Probability of Drawing Red Balls doubles than what it was before. [Given]
So,
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