
Combinatorică şi probabilităţi
Authored by Daniela Ercuta
Mathematics
10th Grade
Used 3+ times

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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Numărul submulțimilor unei mulțimi cu 5 elemente este egal cu:
10
20
2.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
Câte numere naturale de două cifre având cifra zecilor mai mică decât cifra unităților există?
72
1+2+...+8
36
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Nu există
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Determinați probabilitatea ca, extrăgând un număr din mulțimea {1, 2, ..., 30}, acesta să nu fie divizibil nici cu 3, nici cu 5.
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
{6, 7, 8}
(6, 9)
{7, 8, 9}
{7,8}
Answer explanation
X trebuie să fie număr natural cuprins între 0 şi 9.
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Precizia de măsurare a unui aparat de control este de 90%. Determinaţi probabilitatea ca, din 10 măsurători, 8 să fie exacte.
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