Jason and Sandra had a day off from work on October 1. Jason was off from work every third day, and Sandra was off from work every
fourth day. When was the next day both Jason and Sandra were off
from work together?
October 12
October 8
October 7
October 13

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.