Genady Posted March 3, 2022 Posted March 3, 2022 I'd think that in a) it's rather n=9 and r=4... The author was right. 1
Dhamnekar Win,odd Posted March 3, 2022 Author Posted March 3, 2022 (edited) I have made mistakes in the computations of answers to question (a) and (b). Corrected answer:(a) [math]\binom{n + r -1}{r}= \binom{12}{9}= 220 [/math] where n=9 and r = 4 Corrected answer:(b) [math]220 + \binom{15}{13} + \binom{14}{12} + 2 \times \binom{13}{11} =220 +105 +91 + 156 =572[/math] Hence, author's answers are correct. Edited March 3, 2022 by Dhamnekar Win,odd edited latex to work
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now