The table shows the performance of a selection of 112 stocks after one year. (Take S to be the set of all stocks represented in the table. If a stock stayed within 20% of its original value, it is classified as "unchanged".) Companies Pharmaceutical Electronic E Internet Total Increased V 11 19 31 Unchanged N 39 11 50 Decreased D 11 1 19 31 Total 61 2 49 112 Compute n(P U N'). What does this number represent? O n(PU N) is the number of stocks that were either not pharmaceutical stocks, or were not unchanged after a year (or both). O n(PU N) is the number of stocks that were either pharmaceutical stocks, or were not unchanged after a year (or both). O n(PU N) is the number of stocks that were pharmaceutical stocks and were not unchanged after a year. O n(PU N) is the number of stocks that were either pharmaceutical stocks, or were unchanged after a year (or both). O n(PU N) is the number of stocks that were not pharmaceutical stocks and were unchanged after a year.
Angles in Circles
Angles within a circle are feasible to create with the help of different properties of the circle such as radii, tangents, and chords. The radius is the distance from the center of the circle to the circumference of the circle. A tangent is a line made perpendicular to the radius through its endpoint placed on the circle as well as the line drawn at right angles to a tangent across the point of contact when the circle passes through the center of the circle. The chord is a line segment with its endpoints on the circle. A secant line or secant is the infinite extension of the chord.
Arcs in Circles
A circular arc is the arc of a circle formed by two distinct points. It is a section or segment of the circumference of a circle. A straight line passing through the center connecting the two distinct ends of the arc is termed a semi-circular arc.
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