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Counting Pairs

Class 11 Mathematics के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

MathematicsA computer set has (7) keyboard options and (2) mouse options. In how many ways can one keyboard and one mouse be chosen?Class 11Permutations and CombinationsFundamental principle of countingEasy MathematicsIf (A={1,2,3,4}) and (R={(a,b):a+b \text{ is divisible by } 3}), how many ordered pairs are in (R)?Class 11Relations and FunctionsRelationsHard MathematicsOn (A={1,2,3,4}), how many ordered pairs are in (R={(a,b):a\leq b})?Class 11Relations and FunctionsRelationsMedium MathematicsOn the set (A={1,2,3,4}), how many ordered pairs are in the relation (R={(a,b):a<b})?Class 11Relations and FunctionsRelationsMedium MathematicsIf (A={1,2,3,4}) and (R={(a,b):a+b=7}), how many ordered pairs are in (R)?Class 11Relations and FunctionsRelationsEasy MathematicsIf (A={1,2,3}) and (R={(1,1),(1,2),(2,2)}), how many ordered pairs are in (R)?Class 11Relations and FunctionsRelationsEasy MathematicsIf \(A=\{1,2,3,4,5\}\), \(B=\{1,2,3,4,5\}\), and \(R=\{(a,b):a+b\le6\}\), how many ordered pairs in \(R\) have an even first component \(a\)?Class 11Relations and FunctionsRelationsExpert