Combinari

Combinari

10th Grade

10 Qs

quiz-placeholder

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Combinari

Combinari

Assessment

Quiz

Mathematics

10th Grade

Medium

Created by

Dana Catana

Used 28+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 Cn4=Cn11C_n^4=C_n^{11}  are solutia n=

11

7

15

nu are solutie

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 kCnk=kC_n^k=  

n

 n!k!\frac{n!}{k!}  

 nCn1knC_{n-1}^k  

 nCn1k1nC_{n-1}^{k-1}  

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 S=Cn1+2Cn2+3Cn3+...+nCnnS=C_n^1+2C_n^2+3C_n^3+...+nC_n^n  

 2n2^n  

 n×2n+1n\times2^{n+1}  

 n×2n1n\times2^{n-1}  

 n(n1)2\frac{n\left(n-1\right)}{2}  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

x=y=10

x=23, y=14

x=14, y=23

x=23, y=10

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

27

19

13

7

e5

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

1

2

3

12\frac{1}{2}

13\frac{1}{3}

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 Cn5>Cn7C_n^5>C_n^7  Solutia inecuatiei este

n \in  {7, 8}

n \in  {9,10}

n \in  {7, 8,9,10, 11}

n=12

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