contains 15 balls of which x are black and remaining are red if the number of red balls increased by 5 the probability of drawing red balls m by n then m + n = .............(GCD of m,n =1)
Answers
Answered by
9
Step-by-step explanation:
No Of Balls = 15
No Of Blue Balls = x
No Of Red Balls = 15 - x
Probability of taking a red ball is; P(E) = 15 - x
15
After 5 red balls are added,
No of balls = 15 + 5 = 20
No of blue balls = x
No of Red Balls = (15 - x) + 5 = 20 - x
Probability of taking a red ball is; P(E) = 20 - x
20
According to your question, 15 - x x 2 = 20 - x
15 20
30 - 2x = 20 - x
15 20
600 - 40 x = 300 - 15 x
300 =25 x
x = 12.
hope this will help you
thank you.......
Answered by
0
Answer:
27 is the correct answer
thanks ,
it is really correct for his given data
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