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.

Let s do a couple of exercises from our probability one module. There could be anywhere between zero and 100 black marbles and the appropriate number of white marbles to make up the balance. Take out a marble. 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.

Write the probability as a fraction in simplest form a decimal and a percent. Trivially then the answer is frac 1 3 since there is one white. Supposing this red is not replaced the chance of drawing a second red will be 9 15. 2 see answers answer expert verified 4 2 5 2.

On the first you have 10 16 chances to draw a red. This second urn also contains 100 marbles that are either black or white but you do not know their breakdown. So we have a bag with 9 red marbles 2 blue marbles and 3 green marbles in it. What is the approximate probability of drawing two black marbles and then.

There are 18 marbles in total. Call it the second marble. What is the theoretical probability of pulling a red marble from the bag. So that s my bag and we re going to assume that it s a transparent bag so it looks like a.

So let s draw this bag here. A bag contains five yellow marbles nine red marbles three blue marbles six white marbles and seven black marbles. A is simply a set of sequential events. There are 35 marbles in a bag.

P r r 9 20 9 20 81 400 2025. The probability of drawing to marbles then a white one without replacement will be as follows. 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. This is our denominator.

One of them is removed so now there are 17 marbles. There are seven black marbles and nine white marbles in a bag. 9 blue marbles 8 green marbles 4 red marbles 8 white marbles and 6 yellow marbles. Therefore the probability of a is 10 16 9 15 0 375.