A bag contains 5red balls and some blue balls. if probability of drawing blue ball is double that of a red ball, determine the number of blue balls in a bag???
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Answered by
2
Answer:
10
Step-by-step explanation:
Here, the question clearly says that the number of blue balls is twice of the number of red balls. And, the number of red balls is 5 .
So, the number of blue balls = 5 × 2 = 10.
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Answered by
1
Answer:
Let number of blue balls in the bag =x
Total no of balls in bag =5+x [No. of redball =5]
Probability of drawing a blue ball =
No. of blue ball
Total no of ball
P(B)= x
5+x
Probability of drawing a Red ball =
No. of red ball
Total no of ball
P(R)= 5
5+x
Given,
P(B)=2P(R)
x
5+x
=2( x )
( 5+x )
x=10
Hence, no. of blue balls in the bag =10.
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