
Problemas de contagem - 12º ano
Authored by Isabel Amaral
Mathematics
12th Grade
Used 2+ times

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9 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Considere os subconjuntos A e B de um universo U. Qual dos seguintes expressões é igual a A?
A∩(A̅∪B̅)
A∪(B\A)
(A∪B)∩(A∪B̅)
(A∩B)⋃(A̅∩B)
2.
MULTIPLE CHOICE QUESTION
5 mins • 15 pts
Os códigos de cofres fabricados por uma certa empresa constituem uma sequência de seis algarismos como, por exemplo, 034569 ou 103344.
Um cliente vai comprar um cofre a esta empresa e pede um código que satisfaça as seguintes condições:
. tenha exatamente quatro algarismos 1 seguidos;
. os restantes 2 algarismos sejam diferentes;
. a soma de todos os seis algarismos seja um número par.
Quantos códigos diferentes existem satisfazendo estas condições?
44
96
104
210
3.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Um conjunto A tem 7 elementos. Quantos subconjuntos com pelo menos 2 elementos tem o conjunto A?
127
128
108
120
4.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Numa sala há um sofá com 5 almofadas de cores diferentes.
Quantas sequências se podem formar com as almofadas colocadas lado a lado e com as almofadas amarela e azul colocadas nos extremos?
24
12
6
4
5.
MULTIPLE CHOICE QUESTION
2 mins • 10 pts
250
300
350
400
6.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
80
90
100
105
7.
MULTIPLE CHOICE QUESTION
2 mins • 15 pts
1
2
3
4
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