A fair coin is flipped `n` times. Let `E` be the event "a head is obtained one on the first flip", and let `F_k` be the event exactly `k` heads are obtained. Then the value of `n//k` for which `Ea n dF_k` are independent is_______.

A fair coin is flipped n times. Let E be the event "a head is obtained on the first flip" and let F_(k) be the event "exactly k heads are obtained". Then the value of n/k for which E and F_(k) are independent is _____.

A fair coin is tossed 3 times. Let X be the number of heads obtained. Find E(X) and V(X).

An unbiased normal coin is tossed n times. Let E_(1): event that both heads and tails are present in n tosses. E_(2): event that the coin shows up heads at most once. The value of n for which E_(1) and E_(2) are independent is ______.

An unbiased normal coin is tossed n xx.Let E_(1): event that both heads and tails are present in n tosses.E_(2): event that the coin shows up heads at most once.The value of n for which E_(1) and E_(2) are independent is

A fair coin and an unbiased die are tossed.Let A be the event head appears on the coin and B be the event 3 on the die.Check whether A and B are independent events or not.

A coin is tossed thrice.Let the event E be the first throw results in a head and the event F be the last throw results in a tail.Find whether the events E and F are independent.

A fair coin is tossed n times. If the probability of getting 7 heads is equal to the probability of getting 9 heads,then the value of n will be