In the figure shown below, what fractional part of the circle is shaded? a) 4/15 b) 3/18 c) 5/8 d) 11/15

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

Can someone answer this question for me

How can constraints be used to model a real-world situation?