Explore IDNLearn.com to discover insightful answers from experts and enthusiasts alike. Find reliable solutions to your questions quickly and easily with help from our experienced experts.

the heights, x cm, of the 10 girls in an athletics team are such that 
sum of x (∈x) =1550 and ∈x∧2= 241250

a- find the mean and variance
b- one girl, who is 173cm tall, drops out of the tem. calculate the mean and variance of the heights of the remaining nine members of the team