2019 June Business Mathematics and Logical reasoning and Statistics

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Question : 29 of 81

Marks: +1, -0

If A ={a, b, c, d}; B = {p, q, r ,s} which of the following relation is a function from A to B

$R_1= \{{(a, p), (b, q),(c, s)}\}$
$R_2 =\{{(p, a), (b, r),(d, s)\}}$
$R_3 =\{{(b, p),(c, s),(b, r)}\}$
$R_4 =\{ {(a, p)(b, r)(c, q), (d, s)}\}$

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