Malina has to bowl four games in her league. she bowled a 149, 162, and a 152 in her first three games. she wants to have an average score of 154. what score does she need in her fourth game?
a.152
b.153
c.154
d.155

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.