if a 25-sided fair die that is numbered from 1 to 25 is rolled once, find the probability of getting a number (a) less than 5 or at least 20. Show…

if a 25-sided fair die that is numbered from 1 to 25 is rolled once, find the probability of getting a number

(a) less than 5 or at least 20. Show your work in details.

(b) less than 5 and at least 20. Show your work in details