Which situation does NOT describe a uniform probability model?
Responses
A The probability of each outcome when a single 6-sided die is rolled.The probability of each outcome when a single 6-sided die is rolled.
B A glass jar contains 1 red, 3 green, 2 blue and 4 yellow marbles.A glass jar contains 1 red, 3 green, 2 blue and 4 yellow marbles.
C A spinner has 4 equal sectors colored yellow, blue, green and red.A spinner has 4 equal sectors colored yellow, blue, green and red.
D The probability of each outcome when a dime is tossed.
B A glass jar contains 1 red, 3 green, 2 blue and 4 yellow marbles. This situation does not describe a uniform probability model because the probabilities of selecting each marble are not equal.
The situation that does NOT describe a uniform probability model is option B: A glass jar contains 1 red, 3 green, 2 blue, and 4 yellow marbles.
The correct answer is B: A glass jar contains 1 red, 3 green, 2 blue, and 4 yellow marbles.
To determine if a situation describes a uniform probability model, we need to check if each outcome is equally likely to occur.
In option A, when a single 6-sided die is rolled, each outcome (numbers 1 through 6) has an equal probability of 1/6, so it is a uniform probability model.
In option C, if a spinner has 4 equal sectors colored yellow, blue, green, and red, then each color has an equal probability of being selected, making it a uniform probability model.
In option D, when a dime is tossed, there are two possible outcomes: "heads" or "tails." Assuming the dime is fair and unbiased, each outcome has an equal probability of 1/2, making it a uniform probability model.
However, in option B, the glass jar contains different numbers of marbles of each color. Since each color has a different probability of being selected, it does not represent a uniform probability model.