# simulated probability of getting the same cards twice in a shuffled deck
hand <- as.integer(c(7,10,2,3,1))
deck <- 1:52
deck_draws <- replicate(
n = 1e7,
expr = {
sample(
x = deck,
size = 5
)
},
simplify = FALSE
)
hand
#> [1] 7 10 2 3 1
deck_draws[[1]]
#> [1] 50 42 7 41 14
hand %in% deck_draws[[1]]
#> [1] TRUE FALSE FALSE FALSE FALSE
hand == deck_draws[[1]]
#> [1] FALSE FALSE FALSE FALSE FALSE
all(hand %in% x)
#> Error in hand %in% x: object 'x' not found
hand_in_shuffle <- vapply(
X = deck_draws,
FUN = function(x) all(hand %in% x),
FUN.VALUE = logical(1)
)
head(hand_in_shuffle)
#> [1] FALSE FALSE FALSE FALSE FALSE FALSE
scales::percent(mean(hand_in_shuffle), accuracy = 0.000001)
#> [1] "0.000030%"Created on 2022-11-22 with reprex v2.0.2
Session info
sessioninfo::session_info()
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#> setting value
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#> system aarch64, darwin20
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#> collate en_US.UTF-8
#> ctype en_US.UTF-8
#> tz Australia/Melbourne
#> date 2022-11-22
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#>
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#>
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#>
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