Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  CBSE XII  >>  Math  >>  Relations and Functions
0 votes

Let A={1,2,3,....n} and B={a,b}. Then the number of surjection from A into B is \begin{array}{1 1}(A)\quad"p_2 \qquad & (B)\quad 2"-2\\ (C)\quad 2^n-1 \qquad & (D)\quad none\;of\;these\end{array}

Can you answer this question?

1 Answer

0 votes
  • The number of surjections from set A having n elements to set B having 2 elements is $2^n-2$
$A=\{1,2,3,......n\} \qquad B=\{a,b\}$
A has n elements B has 2 elements
number of surjection is $2^n-2$
'B' option is correct


answered Mar 5, 2013 by meena.p

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App