A coin has a probability of 1/4 for head, and is repeatedly tossed until we throw...

A coin has a probability of 1/4 for head, and is repeatedly tossed until
we throw head. The successive results of the toss are independent of each other.
What is the probability that the first time we throw head after an odd number of toss?
Hint: Use the law of total probability and consider the event that the
first toss is head is, and her complement, as conditioning events.

Correct answer: 3/7

Expert Solution

orchestra answered 2 years ago

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