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A jar contains 10 red marbels and 30 green ones How many red marbels must be added to the jar so that 60 percent of the marbels will be red?
Let ( x ) be the number of red marbles to be added. Initially, there are 10 red marbles and 30 green marbles, making a total of 40 marbles. After adding ( x ) red marbles, the total number of marbles will be ( 40 + x ), and the number of red marbles will be ( 10 + x ). To find ( x ), we set up the equation: [ \frac{10 + x}{40 + x} = 0.6 ] Solving this equation gives ( x = 20 ). Therefore, 20 red marbles must be added to have 60% red marbles in the jar.
Which sampling method would best help predict thubube outcome when selecting a marble from a jar that contains 30 red marbles and 20 green marbles?
select a marble from the jar, return it , and record times
What is the probabilityof choosing a green marble from a jar containing 5 red 6 green and 4 blue marbles?
The probability of choosing a green marble from this jar would be 6/15. You get this answer by adding up the sum of all the marbles.
There are 3 red marbles 7 blue marbles 6 green marbles and 4 black marbles in a bag a marble is randomly selected from the bag the number one fifth represents the probability of selecting what color?
a black one
A large bag of marbles contains 57 blue marbles and 74 red marbles and 69 yellow marbles What percent of the marbles are red?
Use this formula - 100 * red / (blue+red+yellow).
A jar contains 40 red marbles and 10 black marbles If you take a random sample of one marble from this jar. What is the probability that the marble will be red?
80% chance, Or 40/50
There are 9 red and 6 blue marbles in a jar If you draw red marbles from the jar 7 times what is the experimental probability of drawing a red marble?
The answer is dependent on whether of not you replace the marbles in the jar. If you do, the probability of drawing a red marble is 9 in 15 or 60%, every time. If you do not replace the marbles, the probability of drawing a red marble is 2 in 8 or 25%.
Suppose a jar contains 3 red marbles and 2 white marbles if a marble is drawn at random what is the probability it is red?
3/5 or .6
What is the chance of a red marble being drawn at random from a jar in which there are 50 red marbles and 50 yellow marbles?
It is 50/100 = 1/2
A marble is selected from a random jar containing 3 red marbles 4 yellow marbles and 2 marbles what are the odds in favor of selecting a red marble?
The probability of selecting a red marble is 3/9
A jar has 6 marbles 1 blue 1 white 1 green 1 yellow 1 red 1 black If 5 marbles are removed at random what is the probability that the green marble was removed?
5/6
Which sampling method would best help predict thubube outcome when selecting a marble from a jar that contains 30 red marbles and 20 green marbles?
select a marble from the jar, return it , and record times
What is the probabilityof choosing a green marble from a jar containing 5 red 6 green and 4 blue marbles?
The probability of choosing a green marble from this jar would be 6/15. You get this answer by adding up the sum of all the marbles.
What is the probability of choosing a red marble from a jar containing 5 red 6 green and 4 blue marbles?
First, you add all the numbers together- 5+6+4=15. So the number of red marbles (5) and the total number of marbles (15)= 5/15=1/3
There are 3 red marbles 7 blue marbles 6 green marbles and 4 black marbles in a bag a marble is randomly selected from the bag the number one fifth represents the probability of selecting what color?
a black one
If there are 3 black marbles 2 white marbles and 1 red marble what is the probability of selecting a black marble?
3/6 or 1/2 or 50%
What is the probability of choosing a marble that is not blue if a jar contains 4 red 7 green and 5 blue marbles?
5:16
