A jar contains 3red marbles, numbered 1 to 3, and 5 blue marbles numbered 1 to 5
The first marble is replaced, and another marble is chosen at random. If you're told the marble has the number 4 on it, what is the probability the marble is red?
Hey, u know what>? I think I just bumped into that question not long ago! :o
Hmmm :/ I think that would be 1/3 mabey>? :\
zero, since there is no red marble numbered 4.
To find the probability that the marble chosen is red given that it has the number 4 on it, we need to use conditional probability.
Step 1: Determine the total number of marbles with the number 4 on it.
In this case, there are a total of 2 marbles with the number 4 on it (one red and one blue).
Step 2: Determine the number of red marbles with the number 4 on it.
In this case, there is only 1 red marble with the number 4 on it.
Step 3: Calculate the probability using the formula:
Probability = (Number of favorable outcomes) / (Total number of possible outcomes).
In this case, the probability of choosing a red marble given that it has the number 4 on it is 1/2.
So, the probability that the marble chosen is red, given that it has the number 4 on it, is 1/2.