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  2. How many 3-digit number can you form by using 7,8,1 only once?​
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How many 3-digit number can you form by using 7,8,1 only once?​

Answers (1)
H Himanshu Meshram

7, 8, 1 three different number

x_x_x

first place can be fill in 3 ways

second place can be fill in 2 ways

third place can be fill in 1 ways

total ways = 3x2x1=6

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