A fair coin is tossed until a head comes up for the first time. What is the probability of this happening on an odd number tosses?
Required Probability = 1/2(First coin turns heads) + 1/2^3 (third coin turns heads) + 1/2^5(Fifth coin turns heads + .......... Required Probability = 1/2 + 1/2^3 + 1/2^5 + 1/2^7 + 1/2^9 ........ Required Probability = 1/2(1-(1/4)) = 2/3.
A tosses a fair coin 50 times. B tosses another fair coin 51 times. What is the probability that B got more heads than A?
Sachin has two coins, one of Rs. 1 denomination and the other of Rs. 2 denomination. He tosses the two coins simultaneously. What is the probability that he gets at least one head?
If you toss a coin ten times and it lands heads up every time, what is the probability that it will land heads up if you toss it again?
A coin is randomly thrown on an infinite square grid. What is the probability that the coin does not touch the grid lines? Diameter of coin : 1cm Width of square grid : 2cm
