La probabilità

Quiz
•
Mathematics
•
8th Grade
•
Medium
Smartschool 3.0
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15 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
a) un romanzo;
b) un giallo.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
a) un numero dispari;
b) un numero minore o uguale a 30;
c) un multiplo di 8.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Una scatola contiene 3 triangoli, 5 quadrati e 7 rombi. Calcola la probabilità di estrarre un triangolo e quella di estrarre un quadrato.
1/5;1/3
1/4;1/3
1/5;1/7
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Pa – escano due teste
Pb – non esca nessuna testa
Pc – esca una sola testa
pd – escano tre teste
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
(reintroducendo la pallina estratta, prima di estrarre la seconda pallina ):
A - escano due palline nere *
B - escano due palline bianche +
C - due palline di diverso colore -
(reintroducendo la pallina estratta, prima di estrarre la seconda pallina ):
A - escano due palline nere *
B - escano due palline bianche +
In un’urna ci sono 3 palline bianche e 2 nere. Calcolare la probabilità che in due estrazioni
(reintroducendo la pallina estratta, prima di estrarre la seconda pallina ):
A - escano due palline nere *
B - escano due palline bianche +
A= 4/25; B=9/25; C=6/25
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