Please Help Given P(A) = 0.25, P(B) = 0.64 and P(A and B) 0.22, find the value
P(A or B), rounding to the nearest thousandth, if necessary.

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236