[" The variance of "20" observations is "5." If each observation is multiplied by "-1" and added by "],[" 2then new variance is "]

The variance of 20 observations is 5 .If each observation is multiplied by -1 and added by 2 ,then new variance is

The variance of observations 3,4,5,8 is

The variance of 50 observations is 7. If each observation is multiplied by 6 and then 5 is subtracted from it, then the variance of the new data is

The variance of 20 observation is 5. If each observation is multiplied by 2, then what is the new variance of the resulting observation?

The variance of 20 observation is 5. If each observation is multiplied by 2, then what is the new variance of the resulting observation?

The variance of 20 observation is 5. If each observation is multiplied by 3, then what is the new variance of the resulting observation?