Let and . Find the number of ordered pairs for which…

MATHEMATICS · Single correct · CBSE · Mathematics · Permutations and Combinations · Permutations and Combinations

Problem

Let

A=\{1,2,3,4,5,6\}

and

B=\{1,2,3,4,5,6,7,8\}

. Find the number of ordered pairs

(a,b)

for which

a\le b

. (a) 31 (b) 33 (c) 27 (d) 30

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