E(R)=24/11
Var(R)=95/121
these are the mean and variance of a four sided spinner that is represented by the discrete random variable R
find the new mean and Variance when the numbers in the spinner are trebled and then subtracted from 1
E[aX+b]=aE[X]+bV[aX+b]=a2V[X]
˜R=1−3RE[˜R]=E[1−3R]=1−3E[R]=1−3(2411)=1−7211=−6111
V[˜R]=V[1−3R]=(3)2V[R]=9(95121)=85511