# BetaPrime Distribution

**URL:** <https://discourse.julialang.org/t/betaprime-distribution/68542>\
**Category:** General Usage\
**Tags:** question, distributions\
**Created:** [September 21, 2021, 5:47pm UTC](https://discourse.julialang.org/t/betaprime-distribution/68542 "2021-09-21T17:47:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Naba7](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/naba7/32/10203_2.png) [@Naba7](https://discourse.julialang.org/u/Naba7)\
**Post date:** [September 21, 2021, 5:47pm UTC](https://discourse.julialang.org/t/betaprime-distribution/68542/1 "2021-09-21T17:47:19Z")

</div>

```julia
b1 = BetaPrime()
rand(rng, b1) === quantile(b1, rand(rng))

```

this returns false, while [this](https://github.com/JuliaStats/Distributions.jl/blob/ed52948fb47e7e0aecaf81e99ebb090c2738cf0e/src/univariates.jl#L177-L181) says otherwise.

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**Author:** ![Elrod](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/elrod/32/22461_2.png) [@Elrod](https://discourse.julialang.org/u/Elrod)\
**Post date:** [September 21, 2021, 5:53pm UTC](https://discourse.julialang.org/t/betaprime-distribution/68542/2 "2021-09-21T17:53:07Z")

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Make sure not to call `rand` separate times, but I’m assuming you didn’t when actually testing.

More importantly [here](https://github.com/JuliaStats/Distributions.jl/blob/ed52948fb47e7e0aecaf81e99ebb090c2738cf0e/src/univariate/continuous/betaprime.jl#L113-L116) is the definition being called:

```julia
julia> @which rand(MersenneTwister(1), BetaPrime())
rand(rng::AbstractRNG, d::BetaPrime) in Distributions at /home/chriselrod/.julia/packages/Distributions/jEqbk/src/univariate/continuous/betaprime.jl:113

```

You can also use `@less` to look at it, or `@edit` to open the file in a text editor.

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<div class="post-metadata">

**Author:** ![Naba7](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/naba7/32/10203_2.png) [@Naba7](https://discourse.julialang.org/u/Naba7)\
**Post date:** [September 22, 2021, 4:37am UTC](https://discourse.julialang.org/t/betaprime-distribution/68542/3 "2021-09-22T04:37:35Z")

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thanks! This helps.