A bag 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 ball Doubles then what it was before find the number of red balls in the bag.
Answers
Answered by
1
Answer:
Step-by-step explanation:
Total balls = 12
Let no. Of red balls be X
P(E) of getting a red ball =X/12
6 balls are added,
Now, total balls = 18
Red balls = X+6
P(E) = 6+X/18
According to Q,
2 × X/12 = 6+X/18
X/6 = 6+X/18
36 + 6X = 18X
12X = 36
X = 3
Total red balls = 3 ( before adding 6 more balls )
Answered by
0
Total Number of Balls in box = 12
Let us Consider that Red ball be x
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,
Similar questions