Given:DE and GH
Prove:DFE and GFH

Iam so stuck. what is the worked out answer for this question?

In a school 2/3 of the students study a language of those who study a language 2/5 study french

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).