An urn contains 10 red balls, 20 yellow balls, and 50 orange balls. if you reach into the urn and select a single ball at random, what is the probability of selecting a orange ball? state your answer as a fraction.

An isosceles triangle has two sides of equal length, a, and a base, b. the perimeter of the triangle is 15.7 inches, so the equation to solve is 2a + b = 15.7. if we recall that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side, which lengths make sense for possible values of b? select two options. –2 in. 0 in. 0.5 in. 2 in. 7.9 in.