Just for fun What is 2+2

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).

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

How to simply and write the answer n a whole number