Please provide a well explained, correct solution for the following

1. An urn holds 5 white and 3 red marbles. [f 2 marbles are to be drawn at random without replacement and X denotes the number of white marbles drawn, nd the probability density function (pdf) of X. 2. _ Sarah plays a free throw game. The probability that she scores is 0.7. Sarah takes 4 attempts. Find the probability that she will score exactly 3 times in 4 attempts