Shane's money is 3: 11 if isabella has 33 dollars how much do shane and isabella have together

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

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The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol