Flip a coin thrice (3 times), and let X and Y denote the number of heads in the first two flips, and in the last two flips, respectively. For example, if the coins turn up h, h,t then X=2 and Y=1, while if they turn up t, t,h then X=0 and Y=1. Find: 1. Cov(X, Y),
2. rho X, Y.

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem