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If you had ten marbles 3 blue and 7 red and you picked out three marbles at the same time what would be the odds of picking 2 blue marbles?
Wiki User
∙ 14y ago
1 in 5.45 of picking at least 2 blue marbles
any 2 from 3 is 3
correct picks =3X7(red)=21 of 2 blue only
1 pick of 3 blue only
any 3 from 10=120
120/22=5.45
Wiki User
∙ 14y ago
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There are 10 marbles in a bag 5 are blue 2 are yellow and 3 are purple what is the probability of picking a purple marble?
well blue would b picked 65percent of the time an purple would be 25 and ten percent would be yellow
A bag contains 6 red marbles 7 blue marbles and 6 green marbles If one marble is randomly picked from the bag what is the probability that this is a blue marble?
There would be a 7/19 or 36.84% chance of drawing a blue marble from the bag.
What would be the chance of picking a multiple of 2 from a deck of cards?
If one card is picked at random from a normal deck of cards, the probability is 20/52 or 5/13.
What are the least numbers of packs of yellow marbles and blue marbles a person would have to buy t ohave the same number of each color of marble?
That would depend on how many yellow and blue marbles are in a pack. If yellow and blue marbles are sold separately and there are the same number of marbles in a pack, buy one of each. That's probably not the case.
If there are 14 white marbles and 28 red marbles what is the probability that you would pick a white marble?
14/42. You have to add the amount of marbles and then put the probabilityof answers you're looking for. Ex: 14 white marbles 28 red marbles 14+28=42 ?/42 your looking for the probability of white marbles, so you put in the amount of white marbles on the fraction. =14/42
There are 10 marbles in a bag 5 are blue 2 are yellow and 3 are purple what is the probability of picking a purple marble?
well blue would b picked 65percent of the time an purple would be 25 and ten percent would be yellow
A bag contains 6 red marbles 7 blue marbles and 6 green marbles If one marble is randomly picked from the bag what is the probability that this is a blue marble?
There would be a 7/19 or 36.84% chance of drawing a blue marble from the bag.
What is the chance of picking 3 nickels in a row from a pot of 50 nickels and 100 pennies?
196/5513, or about .0356=3.56%AssumptionI assume that you are asking what is the probability that the first three coins picked out of the pot are nickels. Obviously the answer would be different if, for example, you are asking what is the probability that if you pick all of the coins out of the pot what is the probability that at some point in picking out coins you will pick three nickels in a row.ExplanationP(three nickels in a row)=P(first coin picked is a nickel)*P(second coin picked is a nickel given that first coin picked is a nickel)*P(third coin picked is a nickel given that first two coins picked are nickels)=(50/150)*(49/149)*(48/148)=196/5513, or about .0356=3.56%
how marbles would there be if there are 30-40 marbles in the bag how many marbles would each person get?
70
Can you get blind if you keep picking them all off?
If by them you mean your eyeballs then yes. I suppose one would go blind if you picked your eyes off your eyesockets.
What would be the chance of picking a multiple of 2 from a deck of cards?
If one card is picked at random from a normal deck of cards, the probability is 20/52 or 5/13.
What is the density 10 marbles?
The density of 10 marbles would depend on the material the marbles are made of. Generally, marbles have a density ranging from 2.5 to 2.75 grams per cubic centimeter. So, the total density of 10 marbles would be the density of one marble multiplied by 10.
In a bag there are 32 red marbles and 32 green how many marbles would you have to remove to ensure you got two different marbles?
33
A bag contains 2 purple marbles and 6 green marbles - Two marbles are drawn at random - so What is the probability that the first marble drawn is green and the second one is purple?
There are 8 marbles in the bag, and 6 are green, so the chance that the first one you pick is green is 6/8 or .75. Let's call the event where you pick the green marble first, G, for green of course. Now since you picked a marble there are only 7 left. If you picked a green one then the chances of picking a purple one are now 2/7 since there are two purple marbles and seven total marbles. Let's call the event of picking the purple marble F, (I was going to use P but we need that letter for probability. Purple is a fine color so I picked F.) Now we use the conditional probability rule that tells us what is the chance of picking purple given that we already picked green. The symbol P(F|G) means probability of event F given that event G has already happened. P(F|G)= (the probability of picking green and purple)/ (probability of picking green.) We know these from above. G=6/8 and If we pick a green, probability of picking a purple is 2/7 so we multiply these to get probability of picking both and we have 6/8x2/7 or 12/56. So 12/56=(Probability of Picking green and purple)/( probability of picking green). We have 12/56=[P(G and F)]/(6/8) we want P(G and F) so we multiply 12/56x 6/8 and we have 72/448 So the answer is : 72/448 or about .16 (NOTE: this would be a totally different problem if we took out the first marble then put it back. It is important to be sure what is being asked. If you replaced the marble, the problem is much easier. It is simply 6/8 x 2/8 =12/64 or 3/16) Some people have trouble remembering or understanding the conditional probability rule. I will take just a second to explain it in the hopes it will make it easier to use and remember. The multiplication rule says if we have two mutually exclusive events, A and B, the probability of A and B is P(A)xP(B), so if we want event A to occur THEN event B, we have P(A)xP(B|A) which means probability of A multiplied by probability of B given A has already happened. This equal probability of A and B so we have: P(A)xP(B|A)=P(A and B) . Now divide by P(A) and we have: P(B|A)=P(A and B)/P(A). This is the way the rule is usually stated. Note: P(A|B)=P(A and B)/P(B).
Example of a ratio?
If you had a bag of marbles, and there were two colours - red and green - and the ratio of the coloured marbles is two times the amount of green marbles to red marbles, you would have a ratio of 2:1
What would the angle measure be to graph 15 red marbles out of 40 marbles?
135 degrees.
If a bag contains 4 green marbles an 4 yellow marbles 5 white marbles what would be more likely to pull a red marble or a white marble from the bag?
You would be more likely to pull out a white marble as there are no red marbles in the bag.
