Question

class 11

20! x 10! /19! x 9!

here [!] represents factorial​

Answer 1

$\huge\star{\tt{\underline{\underline{\red{Answer\implies200}}}}}\star$

see the attachment

Answer 2

『A』『n』『s』『w』『e』『r』

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20*19*18*17...*1*10*9*8*7...*1/19*18*17....*1*9*8*7...*1

=20*10

200

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