3. Which expression is equivalent to (6x*y - 2x"y? - 7xy+19) - (-8xy + 14x*y - 13x”y?+ 10)? a.--8x*y + 11x2y2 + xy + 9
b. 8x*y - 11x*y2 - xy - 9
c. 20x'y - 15x+y2 - 15xy? + 29
d. -20x'y + 15x?y? + 15xy? - 29

What is the probability of throwing several dice with sum equal to 6 (six)? show the ways of possibilities for sum 6 (as the numerator) and the ways of throwing n dices for n = 1, 2, 3, 4 or 5 as denominator for all the questions to earn full credits. (a)throw one die, (b) throw two dice, (c) throw three dice (d) throw 4 dice, (e) throw 5 dice