In a multiple-choice test each question has five possible answers. Two points are given for each correct answer but
one point is deducted for each incorrect answer. What is the
expected value for a question that is answered by randomly
guessing the answer?
A O
B 0.2
C -0.4
D 0.4

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

Which expression and diagram represent “renee biked four times as far this month as last month”?

Ataxi company charges $3 for pick-up plus $0.65 for each mile. select the expressions that represent the cost in dollars for a taxi pick-up and m miles. mark all that apply.