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Mathematics
OpenStudy (anonymous):
How many 3-digit numbers can be formed if the leading and ending digits cannot be zero.
6 years ago
OpenStudy (anonymous):
u can fill the 1st place in 9 ways, second place in 10 ways, 3rd place in 9 ways(as 0 is not allowed in 1st and 3rd place) as these events are independent, the task can be done in 9*9*10 ways=810 ways
6 years ago
OpenStudy (anonymous):
Thank you!
6 years ago
OpenStudy (anonymous):
welcome :)
6 years ago
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