Which spinner represents a uniform probability model?

Question

Responses
A spinner Aspinner A
B spinner Bspinner B
C spinner Cspinner C
D spinner Dspinner D
Question 2
Which situation represents an event from a non-uniform probability model?
Responses
A rolling a 2 on a six-sided dierolling a 2 on a six-sided die
B landing on heads from a flip of a coinlanding on heads from a flip of a coin
C spinning yellow on a spinner with 4 equal partsspinning yellow on a spinner with 4 equal parts
D drawing a red ball from a bag that contains 5 red balls and 3 blue ballsdrawing a red ball from a bag that contains 5 red balls and 3 blue balls

Answer 1

Question 1: Which spinner represents a uniform probability model?

• A uniform probability model means that all outcomes have an equal chance of occurring. To determine which spinner represents a uniform model, we would look for a spinner where all sections are of equal size or have equal probability.

Since I cannot see the spinners, I would advise you to select the spinner that has equal-sized sections.

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Question 2: Which situation represents an event from a non-uniform probability model?

The correct answer is:

D. Drawing a red ball from a bag that contains 5 red balls and 3 blue balls.

In this situation, the probability of drawing a red ball is not equal to that of drawing a blue ball, making it a non-uniform probability model. The other situations involve outcomes that are uniform (equal probabilities).