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If you have 50 black marbles and 50 white marbles in a bag at most how many times would you have to draw out a marble to get two the same colour?
Wiki User
∙ 15y ago
The maximum number of marbles you have to draw is three. 1) Draw a marble. It is either white or black. 2) Draw a second marble. If it is the same colour as the first marble, we are done after two draws. 3) Otherwise, the drawn marbles have different colours. Draw a third marble.
No matter what you draw next, you must have two marbles of the same colour.
Wiki User
∙ 15y ago
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What is the probability of winning at craps?
The odds are set so that the longer you play, the more probable it is you will lose. Its like betting on a jar with a thousand marbles in it. 600 of the marbles are black and 400 are white. You bet $1 each time a marble is picked and your bet is that a white marble will be picked. If a white marble is picked, you get your $1 back plus an additional $1. As the marbles are being picked, you may be winning at times but ultimately you will lose $200 because there are 200 more black marbles than white marbles. This may seem very simplistic but it is exactly what happens when you play craps.
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%.
John has 6 blue marbles and 7 times as many green marbles how many marbles does he have altogether?
48 marbles
A bag of marbles has three times as many blue marbles as red marbles and the bag has at least 52 marbles in it At least how many blue marbles are in the bag?
at least 39 blue marbles
A bag contains 9 marbles 2 green 3 blue and 4 red what is the pobability of picking a green then a non-green?
Short answer: 14/81There is a 2/9 chance of picking a green marble the first time.Since this leaves 8 marbles (only one of which is green; you took the other one), that leaves an 7/8 chance of picking any other colour the second time.To find the overall probability, you simply multiply the two values (2/9 * 7/8 = 14/81). This is simple to understand. You can only get a green marble every 2 out of 9 tries. For each of these 2 times, you have a 7/8 chance of getting a different colour the second time. So, you have a 7/8 chance every 2/9 times. Simply multiply them to get the total number of possibilities.
What is the probability of winning at craps?
The odds are set so that the longer you play, the more probable it is you will lose. Its like betting on a jar with a thousand marbles in it. 600 of the marbles are black and 400 are white. You bet $1 each time a marble is picked and your bet is that a white marble will be picked. If a white marble is picked, you get your $1 back plus an additional $1. As the marbles are being picked, you may be winning at times but ultimately you will lose $200 because there are 200 more black marbles than white marbles. This may seem very simplistic but it is exactly what happens when you play craps.
If you pick a marble, record it’s color, me return it to the bag 200 times, how many times can you expect to pick a marble?
Depends how many marbles are in the bag
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%.
What is the chances you will get a blue marble if there is 4 marbles in all?
Depends on the color of the marbles, or more specifically, it depends upon how many of the marbles are blue. If 0 marbles are blue, then the chance is 0. If 1 marble is blue, then the chance is 1/4. If 2 marbles are blue, then the chance is 1/2. If 3 marbles are blue, then the chance is 3/4. If 4 marbles are blue, then the chance is 1. These probabilities assume that you draw only once. The other possibilities are that you draw twice, or three times, or four times. If drawing multiple times, it can be done by putting back each marble after it was drawn, or by keeping it out after it has been drawn.
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
Was marble made in medieval times?
Before. Marbles have been found in ancient tombs of Egypt.
A bag that has 7 greens marbles 3 blue marbles and 12 white marbles what is the probability of selecting a white marble on each of the three tries if the marble is placed back after each pick?
12 white marbles from (7+3+12) = 22 marblesChance of a white marble on first pick = 12/22 = 6/11.Chance of a white marble on second and third picks are the same, as the marble is replaced.So, the chance of a white marble three times is 6/11 * 6/11 * 6/11 = 216/1331 = approximately 16.23%
In the beginning Jay had 3 times as many marbles as Mar After Jay lost 110 marble Mar had twice as many marbles as Jay How many marbles did they have altogether at first?
They had altogether at first 176 marbles (Mar has 44 and Jay has 132).
In a jar with 17 blue marbles and 43 black marbles when I grab 7 of them how many will be blue?
The total marbles are 60, your mathematical expectation of getting a single blue marble in one try is therefore 17/60. If you grab 7 random marbles, the mathematical expectation is 7 times 17/60. This is the expectation, in an actual experiment you will get more or less than that, but it should be fairly close to the calculated value. (Note that the mathematical expectation in this case isn't even an integer.)
Are toy marbles made of marble?
Since 1915 and the ability to mass produce them with machines, modern marbles have typically been made from glass. Before that in the past they have been made by hand from glass, clay, polished nuts or polished stone. The oldest known marbles were rocks harvested from rivers which had been naturally polished over time from the flowing water; use of river stones as marbles has been found in ancient times through archeology. There have been historical finds of marbles hand made from marble, but it is not a common practice and they are rare. not my answer because I didn't make it, but this answer is the best explanation I have ever heard.
John has 6 blue marbles and 7 times as many green marbles how many marbles does he have altogether?
48 marbles
When were playing marbles invented?
There isn't a definite date, but Marbles originated in Harappan civilization in Pakistan near the river Indus. Various marbles of stone were found on excavation near Mohenjo-daro. Marbles are also often mentioned in Roman literature, and there are many examples of marbles from ancient Egypt. They were commonly made of clay, stone or glass and commonly referred to as a "Glass alley". Ceramic marbles entered inexpensive mass production in the 1870s
