Q: What is the reason for change in color of marbles in tajmahal?

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7

a black one

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.

We will assume that the bag contains 11 marbles (this is not a trick question!), so 4 are blue and 7 are not blue, so the probability of a color other than blue is 7/11.

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.

Related questions

The TajMahal is made out of marble but it is the color pink in the morning, white in the evening and gold in the moonlight.

The theoretical probability of randomly picking each color marble is the number of color marbles you have for each color, divided by the total number of marbles. For example, the probability of selecting a red marble is 3/20.

6

5/10

Since none of the marbles change color, or become some other compound, they are the same mixed as when they are apart. You can easily pick them up and sort them into two groups again.

a bag contains 150 marbles some of the marbles are blue and the rest of the marbles are white in the bag there are 21 blue marbles for every 4 white marbles how many of each color marble blue and white are in the bag show or explain your thinking

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7

Chameleons camouflage by changing color, though that is not the only reason they change color. Chameleons change color with lighting, mood, and enviornment.

6

a black one

Same reason humans' hair changes color when they get older.