Sampling Distribution Models - Homework question

The question is:
In a really large bag of M&M’s, the students in Exercise 8 found 500 candies, and 12% of them were green. Is this an unusually large proportion of green M&M’s? Explain.

Previous questions #6 and #8 relate to this question, but we weren't assigned those so I'm assuming their answers do not contribute to this one.

I am aware I am supposed to apply a Normal distribution model with a p = 0.1. I don't understand why it's not 1/6 (green/all color options) for a p = 0.167. What am I missing here?

crimpingcatlady said:

In a really large bag of M&M’s, the students in Exercise 8 found 500 candies, and 12% of them were green. Is this an unusually large proportion of green M&M’s? Explain.

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Lacking information on the "usual" proportion, there is no way to respond.

crimpingcatlady said:

Previous questions #6 and #8 relate to this question, but we weren't assigned those so I'm assuming their answers do not contribute to this one.

Click to expand...

At the very least, I suspect that those other questions include information which could be helpful (as might questions 5, 7, 9, etc).

Please reply with all of the information for this exercise. Thank you!