Use the given the probability distribution to answer questions 13 – 16. P(x) 0.13 1 0.20 2 3 0.23 4 0.34 13. What probability is need for x = 2 to make it a valid distribution? 14. Find the...

need help with problem 15

Extracted text: Use the given the probability distribution to answer questions 13 – 16. P(x) 0.13 1 0.20 2 3 0.23 4 0.34 13. What probability is need for x = 2 to make it a valid distribution? 14. Find the probability when x is at least 3? 15. What is the expected value of the probability distribution? Round to two decimal places.