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Relations and Functions
If n(A) = 4, n(B) = 6, then the number of 1-1 functions from A to B is
$\begin{array}{1 1} 24 \\ 60 \\ 120 \\ 360 \end{array}$
jeemain
math
class12
ch1
relations-and-functions
types-of-functions
medium
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asked
May 1, 2013
by
rvidyagovindarajan_1
edited
Apr 5, 2016
by
meena.p
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If n(A)=m, n(B)=n then no. of functions from A to B=$n^m$
No. of one-one functions = $^nP_m$
Ans: $^6P_4=\large\frac{6!}{2!}=360$
answered
May 1, 2013
by
rvidyagovindarajan_1
edited
May 17, 2014
by
rohanmaheshwari0831_1
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