Originally Posted by

**Tweety**

(a) Find the probability that Linda scores 30 points in a round.

$\displaystyle 0.6^3 = 0.216 $

The random variable X is the number of points Linda scores in a round.

(b) Find the probability distribution of X.

x = 0, 10 , 20 , 30

p(x) 0.4 0.24 0.144 0.216

(c) Find the mean and the standard deviation of X.

$\displaystyle E(X) = 11.76 $

$\displaystyle SD = 11.7 $

A game consists of 2 rounds.

(d) Find the probability that Linda scores more points in round 2 than in round 1.

I need help woth the last question, 'd', How do I start?