n unbiased dice is thrown once. Write down the probability distribution of the score X and show that Var(X) = 35/12 = I've done this!!!

The same dice is thrown 70 times.

a) Find the probability that the mean score is less than 3.3.

b) Find the probability that the total score exceeds 260.

is this somewhat related to the first part explain!!!

the answers:-

a part)0.155

b part)0.845

I got the first one but second part T IS THE SUM p(T>260.5) AFTER CC N(245,(14.289)^2), p(Z>1.084)=1-.8586=1.015 BT ANS IS .845 PLS DO SHARE UR IDEAS