Question

how many numbers between 100 to1000 have the digit 7 exactly once​

Answer 1

Answer:

The answer is 8×9×1=72. please mark me as brainliest

Answer 2

Answer:

Thus units place has 7. so it can be filled in only one way.

Thus there are 8x9x1 = 72 no.s of the first kind. So, the total no. of required type of no.s = 72+72+81 = 225

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with regards @Arsh