Amarble is drawn at random from the bag shown below. the bag contains 3 green, 4 yellow, 5 blue, and 8 pink marbles. what is the probability that the marble drawn is a green or blue?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of