Which expressions have a value of –23? choose all answers that are correct.
a. 11 – 34
b. –9 – (–14)
c. 25 – 2
d. –11 – 12

Airline passengers arrive randomly and independently at the passenger-screening facility at a major international airport. the mean arrival rate is 10 passengers per minutes. compute the following probabilities. p(x = 4) p(x > 11)

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd

1. if events a and b are non-overlapping events, how do you find the probability that one or the other occurs? 2. what does it mean if p(a or b) equals 1?