05. A bag contains 5 red balls and some blue balls If the probability
of drawing a blue ball is double that of a red ball, then the number of
blue balls in a bag is
(A)5
(B)10
(C) 15
(D)20
Answers
Answered by
1
Answer:
Answer:- B) 10
Step-by-step explanation:
Hope it helps you
Pls mark me as Brainliest
Answered by
1
Answer
Correct option is
A
10
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 =
Total no of ball
No. of blue ball
P(B)=
5+x
x
Probability of drawing a Red ball =
Total no of ball
No. of red ball
P(R)=
5+x
5
Given,
P(B)=2P(R)
5+x
x
=2(
5+x
5
)
x=10
Hence, no. of blue balls in the bag =10.
Similar questions