Abag contains 20 marbles: 5 red, 5 blue, and 10 yellow. what is the probability that a red is randomly selected? a) b) c) d)

Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.