0.06 m = 7.2 what is the numeral answer

What is (28 + 7 + 6 + 3) x 1/2 show your work

Ineed if you could explain and give me the answer you! this needs done

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.