A number expressible in the form of a/b or -a/b for some fraction a/b

Ineed i don’t get this at all! and you

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents