A box contains 5 red, 3 green and 4 blue balls. A boy is allowed to take away two balls from the box. What is the probability that the two balls are red?
Question 1 Report
A box contains 5 red, 3 green and 4 blue balls. A boy is allowed to take away two balls from the box. What is the probability that the two balls are red?
Answer Details
There are 12 balls in total in the box, out of which 5 are red.
When the boy takes out the first ball, there are 11 balls left, out of which 4 are red.
Therefore, the probability of the first ball being red is 5/12, and the probability of the second ball being red is 4/11.
To find the probability of both events happening together, we multiply the probabilities:
\(\frac{5}{12}\times\frac{4}{11}=\frac{5}{33}\)
Therefore, the probability that the two balls taken out are both red is 5/33.
Answer: \(\frac{5}{33}\)
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