There Are Seven Black Marbles And Nine White Marbles

Total number of marbles 16 total number of black marbles 7 total number of white marbles 9 probability of drawing a black marble on first 7 16 probability of drawing a black marble on second draw 6 15 probability of drawing a white marble on the 3rd draw 9 14.

There are seven black marbles and nine white marbles.

There could be anywhere between zero and 100 black marbles and the appropriate number of white marbles to make up the balance. So we have a bag with 9 red marbles 2 blue marbles and 3 green marbles in it. You draw ten marbles out as before and this time you get seven black and three white. A bag contains five yellow marbles nine red marbles three blue marbles six white marbles and seven black marbles.

There are a number of ways of approaching this problem but the easiest solution is to realize that it doesn t matter what order you took the marbles out in. Supposing this red is not replaced the chance of drawing a second red will be 9 15. A is simply a set of sequential events. This is our denominator.

Trivially then the answer is frac 1 3 since there is one white. Write the probability as a fraction in simplest form a decimal and a percent. 2 see answers answer expert verified 4 2 5 2. Therefore the probability of a is 10 16 9 15 0 375.

There are 18 marbles in total. So let s draw this bag here. What is the approximate probability of drawing two black marbles and then. Take out a marble.

So that s my bag and we re going to assume that it s a transparent bag so it looks like a. This second urn also contains 100 marbles that are either black or white but you do not know their breakdown. There are 35 marbles in a bag. One of them is removed so now there are 17 marbles.

All of the original white marbles are still in the bag so there is a 4 out of 17 or 4 17 chance that the next marble taken out of the bag will be white. What is the theoretical probability of pulling a red marble from the bag. On the first you have 10 16 chances to draw a red. P r r 9 20 9 20 81 400 2025.

Note that there are 16 total marbles. 9 blue marbles 8 green marbles 4 red marbles 8 white marbles and 6 yellow marbles. There are seven black marbles and nine white marbles in a bag. What is the probability of randomly selecting a non blue marble from of the bag.