Question

A bag contains 10 white balls and and m black balls if the probability of drawing a black ball is double that of a white ball find m
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Answer 1

Answer:

20

Step-by-step explanation:

Let,

probability of drawing a white ball=P(W)=10/10+m

then,

probability of drawing a black ball =P(B)

=2[P(W)]=2[10/10+m] =20/10+m

P(E)=P(W)+P(B)

=(10/10+m)+(20/10+m)=30/10+m

30/10+m=1

30=10+m

m=20

HOPE THIS ANSWER HELPS YOU...

Answer 2

Answer:

hey mate your answer is 20............

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