If the shape parameter of the gamma distribution is twice the scale parameter, what will be the value of the mean of the distribution?

If the shape parameter of the gamma distribution is twice the scale parameter, what will be the value of the mean of the distribution? Correct Answer 2

As for a gamma distribution, mean μ=r/λ; putting the value r=2λ from the question, we get, μ=2λ⁄λ=2.
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