a jar contains 4 red marbles, 3 blue marbles, 2 white marbles,1 green marble. What is the probability of selecting a Red or White marble?

Answer 1

4+3+2+1 = 10 marbles total

4+2 = 6 = number of red and white marbles

Pr(R or W) = 6/10 = 60% chance of selecting a Red or White marble