Quiz: Normal Approximation to the Binomial

A binomial distribution has n = 200 and π = 0.25. Use this data for questions 1 through 4.

Cliff's Notes

Of 100 students asked if they like rock and roll or country music, 7 said they like neither, 90 said they like rock and roll, and 57 said they like country music. How many students like both?
I'm taking geometry and I'm having problem with the angles and the degree. Is there a way you can help me out?

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