Math, asked by telangnisha6, 9 months ago

How many four digit numbers can be formed using the
digits 1, 2 only so that each of these digits is used at
least once.

Answers

Answered by krishnakumaranmol

1

9321

Step-by-step explanation:

first we add 1 and 2 we got 3 ,we take square root of 3 we got 9

it is not perfect answer

i hope that it is right

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