Assinale a alternativa que melhor julga a sentença abaixo: “As frações 3/9 e 7/18 são equivalentes, pois representam a mesma parte do todo”
( ) Verdadeiro
( ) Falso

AJUDA PFV

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.