Question
There are twelve boxes out of which only four boxes
contain chocolates, and remaining boxes are empty. You picked one of the boxes randomly. Now the owner of boxes opened four more boxes, out of which one box contains chocolates and the other three are empty. The owner now gives you the opportunity to switch the already picked box. If you switched the box randomly, then find the probability that the box you picked now contains chocolates. (Note: Owner already knows the boxes which contain chocolates)Solution
Probability that the box picked by you initially contains chocolates = (4/12) = (1/3) Probability that the box picked by you initially does not contain chocolates = 1 - (1/3) = (2/3) Remaining number of boxes = 12 - 4 - 1 = 7 Case I: when the box picked by you contains chocolates Out of the remaining 7 boxes, two contain chocolates Probability that the box picked by you now contains chocolates = (2/7) Case II: when the box picked by you does not contain chocolates Out of the remaining 7 boxes, three contain chocolates Probability that the box picked by you now contains chocolates = (3/7) Required probability = (1/3) X (2/7) + (2/3) X (3/7) = (2/21) + (6/21) = (8/21)
A social process through cultural difference between 2 or more societies disappear and develop a common culture is called
Deficiency of which vitamin is prominent in those persons who continuously eat ‘polished rice’?
For higher yield and better grain quality PR 124 and PR 126 transplanting should be done from
Rashtriya Gokul Mission is related to:
Which of the following has no Pi bond?
The highest cooking losses are reported for
Which type of water absorption relies on the osmotic gradient, with root cells actively participating in the process by spending metabolic energy?
PAU 881 is an early maturing variety of
……………………………………also known as proprietary audits, a primary organization evaluates the
performance of a supplier or c...
India’s first ever coal gasification based fertilizer plant to be set up in
Relevant for Exams:
