Question

A box contains 9 red marbles, 12 blue marbles, 13 green marbles and 14 white marbles. What is the probability of picking a marbles that is not white? (give answer as a percentage rounded to the nearest tenth) Plnot white)=[answer]

Answer 1

Xan, this is the solution to the problem.

Step 1: We need to calculate how many marbles we have in the box. Thus, we add up them:

• Marbles in the box = 9 + 13 + 14 + 12

,

• Marbles in the box = 48

Step 2: Now, we calculate how many marbles aren't white. Therefore, we add up this way:

• Not white marbles in the box = 9 + 12 + 13

,

• Not white marbles in the box = 34

Step 3: Finally, we calculate the probability of picking a not white marble, as follows:

• Probability = Not white marbles in the box/Marbles in the box

,

• Replacing by the values we know:

,

• Probability = 34/48

,

• Probability = 70.8%