# Math Help - The Expected number of tosses to get N heads in a row

1. ## The Expected number of tosses to get N heads in a row

You have a fair unbiased coin. How many times on average do you need to toss it to get n heads in a row.

Spoiler : Probability Puzzles: Getting Heads in a Row

2. ## Re: The Expected number of tosses to get N heads in a row

Hey broccoli7.

Hint: The probability for n heads in a row will be 1/2^n. Think about the inverse of the probability and what it means frequency wise.