0 votes 0 votes How many ways are there to select $12$ countries in the United Nations to serve on a council if $3$ are selected from a block of $45, 4$ are selected from a block of $57,$ and the others are selected from the remaining $69$ countries? Combinatory kenneth-rosen discrete-mathematics counting combinatory descriptive + – admin asked Apr 29, 2020 admin 620 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes selecting 3 countries from 45 countries is C(45,3) selecting 4 countries from 57 countries is C(57,4) selecting 5 countries from 69 countries is C(69,5) Therefore the total number of ways are C(45,3) x C(57,4) x C(69,5). Vijay111 answered Oct 1, 2023 Vijay111 comment Share Follow See all 0 reply Please log in or register to add a comment.