Question

a jar contains 450 solid-colored marbles, each of which is either white, red ,blue , yellow or green. The results of a random selection of 30 of the 450 marbles are shown in the table above. Based on this one sample , which of the following is the best estimate of the number of red marbles in the jar.

Answer 1

Our problem involves probability. One thing that we must take note of probabilities is that the higher the number of a certain thing is, the higher probability of it happening. For example, in a lottery the higher the number of of tickets that you will buy the higher the chances of you winning the lottery.

Now let us talk about the basic formula of the probability of an event happening. The probabilty of an event happening is just the ratio of the number of a certain outcome to the total number of outcomes. Presenting it as an equation we get:

`P(A)=\frac{\text{Number of a certain Outcome}}{\text{Total number of Outcome}}`