your own question, for FREE!
How many 3-digit numbers can be formed if the leading and ending digits cannot be zero.
Join the QuestionCove community and study together with friends!
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
Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!
Join our real-time social learning platform and learn together with your friends!