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Out of 3n consecutive integers, three are selected at random. Find the probability that their sum is divisible by 3.
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Question 1
In a certain college, 4% of boys and 1% of girls are taller than 1.75 metres. Furthermore, 60% of the students in the college are girls. A student is selected at random from the college and is found to be taller than 1.75 metres. Find the probability that the selected student is a girl.Stuck on the question or explanation?
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Question Text | Out of 3n consecutive integers, three are selected at random. Find the probability that their sum is divisible by 3. |