Pregunta
19 A bag contains a number of identical balls, half of which are red, one-third are black, and the remainder are white. If a ball is drawn randomly, the probability that the drawn ball is white is
Ask by Haynes Christensen. in Egypt
Mar 27,2025
Solución de inteligencia artificial de Upstudy
Respuesta verificada por el tutor
Responder
The probability of drawing a white ball is
.
Solución
Let the total number of balls be
.
-
The number of red balls is given by:
-
The number of black balls is given by:
-
The total number of red and black balls together is:
-
The remaining balls, which are white, are:
-
Therefore, the probability of drawing a white ball is:
Thus, the probability that a drawn ball is white is
.
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Mind Expander
Let’s say the total number of balls in the bag is
. If half are red, that means there are
red balls. One-third being black means there are
black balls. The remainder, which is white, can be calculated by finding how many balls are left after removing the red and black balls.
The remaining portion is:
To simplify this expression, we first need a common denominator, which is 6:
So, there are
white balls.
The probability of drawing a white ball is then given by the number of white balls divided by the total number of balls:
Thus, the probability that the drawn ball is white is
.

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