What is 0.2666 rounded to the nearest hundredth

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).

The verbal translation for the difference of m and 7 increased by 15

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?