To determine the count of 4-digit numbers with a product of digits equal to 60, we find all combinations of digits that multiply to 60, ensure they do not start with zero and then calculate the permutations for each combination. ;
The total number of 4-digit numbers with a digit product of 60 is 36. This includes combinations from valid digits and their permutations. The valid combinations are (1, 2, 5, 6) and (2, 2, 3, 5).
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[tex]12.000.000 \times 10\% \\ = 12.000.000 \times \frac{10}{100} \\ \\ = \frac{120.000.000}{100} = 1.200.000[/tex]