point o is the incenter of triangle abc.

point o is the incenter of triangle a b c. lines are drawn from the points of the triangle to point o. lines are drawn from point o to the sides of the triangle to form right angles and line segments o q, o r, and o s. angle o b c is 15 degrees. angle o c r is 30 degrees.
what is mangleqob?

a. 30°
b. 60°
c. 75°
d. 90°

Consider a bag that contains 220 coins of which 6 are rare indian pennies. for the given pair of events a and b, complete parts (a) and (b) below. a: when one of the 220 coins is randomly selected, it is one of the 6 indian pennies. b: when another one of the 220 coins is randomly selected (with replacement), it is also one of the 6 indian pennies. a. determine whether events a and b are independent or dependent. b. find p(a and b), the probability that events a and b both occur.