(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

coin tossed 70 times, find exact value for probability that number of heads is between 35 and 55

2. Relevant equations

NA

3. The attempt at a solution

P(heads) = 1/2;

and then I am not sure....

edit: ok, maybe something like this:

(1/2)*(35/70) - (1/2)*(55/70) ?? could someone confirm/correct?

Thanks in advance.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Forgot basic probability stuff

**Physics Forums | Science Articles, Homework Help, Discussion**