Best Answer

There are 3168 such numbers.

2673 have one 7

459 have two 7s

35 have three

and 1 has all four 7s.

Numbers with leading 0s are excluded.

Q: How many 4 digit numbers have 7?

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Without repeats there are 4 × 3 = 12 possible 2 digit numbers. With repeats there are 4 × 4 = 16 possible 2 digit numbers.

9 x 9 x 8 x 7 = 4,536

There are 8*9*8*7*6*5*4 = 483840 numbers.

7777

Related questions

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There are 840 4-digit combinations without repeating any digit in the combinations.

Without repeats there are 4 × 3 = 12 possible 2 digit numbers. With repeats there are 4 × 4 = 16 possible 2 digit numbers.

9 x 9 x 8 x 7 = 4,536

9 x 9 x 8 x 7 = 4,536

9 x 9 x 8 x 7 = 4,536

You can make 4*3*2/2 = 12 numbers.

There are 8*9*8*7*6*5*4 = 483840 numbers.

7777

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