Suppose that the discrete random variable X has cumulative distribution function given by F(x) =    0 if x < 1 1 3 if 1 ≤ x < 4 3 1 2 if 4 3 ≤ x < 3 2 3 4 if 3 2 ≤ x < 9 5 1 if x ≥ 9 5 Find the possible values and the probability mass function X.

Uneed to add them up 27+18+23=68

1.   an exact solution requires a radical solution - no decimal approximation.2. (a)4x^3 = 756x^3 = 756/4 = 189x =   cube root of 189 =   5.74   to nearest hundredth answer(b)   189 = 3*3*3*7   so we can write the cube root of 189 as 3∛7 answerchecking (a) 4*(5.74^3 =   756.48   which is very close(b)   4* ((3∛3)^3   = 4*189   = 756   - spot on! 3. i would use solution b because the original question asked for an exact solution.