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| birth <- function(n) { | |
| deno <- 365^n | |
| nume <- prod(365:(365-n+1)) | |
| result <- 1- (nume / deno) | |
| return(result) | |
| } | |
| nrep <- 10000 | |
| cnt <- 0 | |
| for (i in 1:nrep) { | |
| x <- sum(duplicated(sample(1:365,23,replace = TRUE))) | |
| if (x !=0) { | |
| cnt = cnt+1 | |
| } | |
| } | |
| print(cnt/nrep) |
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