1 votes 1 votes Each day, you independently decide, with probability p, to flip a fair coin. Otherwise, you do nothing. (a) What is the probability of getting exactly 10 Heads in the first 20 days? (b) What is the probability of getting 10 Heads before 5 Tails? Probability gravner probability engineering-mathematics + – ajaysoni1924 asked Oct 23, 2019 ajaysoni1924 750 views answer comment Share Follow See all 6 Comments See all 6 6 Comments reply Show 3 previous comments ajaysoni1924 commented Oct 24, 2019 reply Follow Share @Naveen Kumar 3Why we taking here p/2 0 votes 0 votes techbd123 commented Oct 24, 2019 reply Follow Share @Naveen Kumar 3 I also think so. 0 votes 0 votes Naveen Kumar 3 commented Oct 24, 2019 reply Follow Share @ajaysoni1924 each day we are first flipping a coin with probability p, then getting a head with probability 1/2. so, P(success)= p*(1/2) =p/2 {both are independent events} &, P(not success)= (1-p/2) 1 votes 1 votes Please log in or register to add a comment.