If the first marble chosen was a white marble what is the probability of choosing without replacement another white marble.
Marbles in a box answer.
A assume that the first marble is replaced in the box before drawing the second marble.
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Answer the following questions.
In the second trial after the first trial a marble is drawn randomly from box b.
A random experiment is performed in two sequential trials by first drawing a marble randomly from box a and putting it into box b.
In the second trial after the first trial a marble is drawn randomly from box b.
One red one green and one blue.
Marbles in a box.
Box b contains 7 white and 4 black marbles.
A box contains 16 green marbles and 5 white marbles.
In the second trial after the first trial a marble is drawn randomly from box b.
A random experiment is performed in two sequential trials by first drawing a marble randomly from box a and putting into box b.
Box b contains 7 white and 4 black marbles.
Age 11 to 16 challenge level.
Box b contains 7 white and 4 black marbles.
Consider an experiment where two marbles are drawn from the box.
Are the two trials independent or dependent.
Answer the following questions.
Imagine a three dimensional version of noughts and crosses where two players take it in turn to place different coloured marbles into a box.
Express your answer as a fraction or a decimal number rounded to four decimal places.