Question 3 (1 point)
John is painting a picture. He has green, red, yellow, purple, orange and blue paint. He wants to use four different colors on this picture. If order
does not matter, how many ways can John pick four colors for his picture, if one of them is green?
O a 15
Ob 10
Oc 4
Od 6.

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?