Robert is serving 16 drinks to his friends. there are three times as many drinking tea as lemonade and four are drinking water. how many if each type of drink does robert have

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.)