Question

A coin is tossed untill the head obtained .What is the expected no of tosses required?

Answer 1

Hello.. ☺

Let X denote the number of tails tossed before the head appears.


so we can say that then X is a geometric random variable.

Let P(head) = pp, where 
0<p≤10<p≤1

remember :-
it is not given whether the coin is balanced....!!!!!!!!!!


thank you ☺