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Bob has 21 colors of paints. He mixes 2 colors at a time. How many...

Bob has 21 colors of paints. He mixes 2 colors at a time. How many different colors does he get when he mixes all possible pairs of paints? This problem is an example of a _______________:


joint probability

conditional probability

permutation

combination

none of the above


  Event A has a probability of 0 and Event B has a probability of 0.50. What is the probability associated with the joint occurrence of these two independent events?


0

0.50

0.25

1

none of the above



You flip a coin four times. What is the probability of getting the specific outcome of all heads instead of tails on each of the four times?

0

0.50

0.25

1

none of the above

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