There are four numbers, the first three are in G. P. and the last three are in AP. The sum of first and second term is 6 and the sum of other two is
20. Find the numbers.

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)