Question

In a box there are 5 red 3 blue and 2 white balls three balls are chosen randomly with replacement. find the probability that no ball is red

Answer 1

Answer:

Red=5

Blue=3

White=2

Total balls(outcomes)=5+3+2=10

Total non-red balls=5

so, probability=5/10=1/2=0.5

Answer 2

Probability that no ball is red is 0.5 or 50%.

Explanation:

In this example,there are 5 red balls,3 blue balls and 2 white balls.Hence,the total number of balls=$(5+3+2)=10$ balls.

Notice that the total number of red balls here are 5 and the total number of non-red balls are also 5,from which 3 are blue and 2 are white.

We know that probability of any single occurrence=Frequency of that particular occurrence divided by the total possible number of outcomes or occurrences

Hence,probability of picking up a non red ball=$\frac{5}{10}$=0.5 or 50%

Therefore,probability that no ball chosen is red is 0.5 or 50%.