rahul goyal wrote:4 bad apples accidentally got mixed up with 20 good apples.
In a draw of 2 apples at random, expected number of bad apples is
(a) 1
(b) 2/3
(c) 1/3
(d)1/6
Probability of picking the bad apple in first pick = 4/24 = 1/6
Probability of picking bad apple in nth pick is same the first pick. Hence in second pick also 1/6
Hence total probability = 1/6 + 1/6 = 1/3
Hope this helps!!
"Once you start working on something,
don't be afraid of failure and don't abandon it.
People who work sincerely are the happiest."
Chanakya quotes (Indian politician, strategist and writer, 350 BC-275BC)
