Current record reveals that 550 females have been born among randomly selected

1000 families. The probability that next child among those families will not be female

is an example of

a. a priori probability

b. subjective probability

c. empirical probability

d. none among a, b, c

A system controller claims that Mean Downloading time of a document has normal

distribution with =38 seconds and standard deviation =5 seconds. A document is

randomly chosen, the probability that its downloading time is more than one minute is

a. exactly 0

b. close to 0

c. almost 1.0

d. none of a, b, c