A) 10
B) 20
C) 30
D) 40
Correct Answer: C
Solution :
[c] Total number of balls \[=6+n\] |
So, the possible number of outcomes \[=6+n\] |
Now, P(drawing a green ball) \[=\frac{6}{6+n}\] |
also, P(drawing a yellow ball) \[\frac{n}{6+n}\] |
According to the question, |
\[\frac{n}{6+n}=5\left( \frac{6}{6+n} \right)\,\,\,\,\Rightarrow \,\,\,\,\,n=30\] |
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