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1.Relation and Function
hard
एकैकी फलन
$f :\{ a , b , c , d \} \rightarrow\{0,1,2, \ldots, 10\}$
की संख्या, ताकि $2 f ( a )- f ( b )+3 f ( c )+ f ( d )=0$
है, होगी
A
$32$
B
$31$
C
$22$
D
$89$
(JEE MAIN-2022)
Solution
$2 f(a)+3 f(c)=f(d)-f(b)$
Using fundamental principle of counting
Number of one-one function is $31$
Standard 12
Mathematics