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.

What is the probability of randomly selecting a non blue marble from of the bag. A is simply a set of sequential events. The probability of drawing to marbles then a white one without replacement will be as follows. On the first you have 10 16 chances to draw a red.

Call it the second marble. Write the probability as a fraction in simplest form a decimal and a percent. Supposing this red is not replaced the chance of drawing a second red will be 9 15. 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.

2 see answers answer expert verified 4 2 5 2. There are seven black marbles and nine white marbles in a bag. There are 18 marbles in total. So let s draw this bag here.

9 blue marbles 8 green marbles 4 red marbles 8 white marbles and 6 yellow marbles. Trivially then the answer is frac 1 3 since there is one white. Therefore the probability of a is 10 16 9 15 0 375. 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.

Take out a marble. This is our denominator. What is the theoretical probability of pulling a red marble from the bag. 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. A bag contains five yellow marbles nine red marbles three blue marbles six white marbles and seven black marbles. P r r 9 20 9 20 81 400 2025.

There could be anywhere between zero and 100 black marbles and the appropriate number of white marbles to make up the balance. So that s my bag and we re going to assume that it s a transparent bag so it looks like a. One of them is removed so now there are 17 marbles. Let s do a couple of exercises from our probability one module.