Respuesta :
Answer:
2/3 is your answer.
Step-by-step explanation:
since there is 12 marbles all together, you add the white and red marbles together and you get 8 marbles. which is 8/12, then you divide by a common denominator, and you get 2/3.
The probability of drawing either a red or a white marble is 2/3.
What is probability?
"Probability is a branch of mathematics which deals with finding out the likelihood of the occurrence of an event."
Formula of the probability of an event A is:
P(A) = n(A)/n(S)
where, n(A) is the number of favorable outcomes, n(S) is the total number of events in the sample space.
For given example,
A jar contains 3 red, 4 blue, and 5 white marbles.
This means, there are 3 + 4 + 5 = 12 marbles in a jar.
⇒ n(S) = 12
Let event A: drawing either a red or a white marble
The number of red and white marbles are:
3 + 5 = 8
⇒ n(A) = 8
So, the probability of drawing either a red or a white marble would be,
⇒ P(A) = n(A)/n(S)
⇒ P(A) = 8/12
⇒ P(A) = 2/3
Therefore, the probability of drawing either a red or a white marble is 2/3.
Learn more about probability here:
brainly.com/question/11234923
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