We toss a symmetric coin 19 times and denote the number of heads by X. Then we toss an additional 7 times and by Y denot
Posted: Fri Dec 24, 2021 9:55 am
We toss a symmetric coin 19 times and denote the number of heads by X. Then we toss an additional 7 times and by Y denote the number of tails in this second series of tosses. Find the variance of X-Y. Answer: