what will be the answer ,please explain it.
a-720
b-900
c-999 d-1000
a-720
b-900
c-999 d-1000
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If you mean how many numbers there are that contain 3 digits does 1 count?
If not, the numbers start at 100 and finish at 999 and there are 900 of these,
so answer is b.
If not, the numbers start at 100 and finish at 999 and there are 900 of these,
so answer is b.
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the number containing three digits,
repitition are allowed, is
1000 -(D)
since the number started from
0, 1, 2, 3, 4, 5,6, 7,8,9
then, number of ways arrange this 10
digit number taken three at a time
which repitition are allowed
10 x 10 x10 =1000
repitition are allowed, is
1000 -(D)
since the number started from
0, 1, 2, 3, 4, 5,6, 7,8,9
then, number of ways arrange this 10
digit number taken three at a time
which repitition are allowed
10 x 10 x10 =1000
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answer is A.
it alone contains three different digits and so is unique,
it alone contains three different digits and so is unique,
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d-1000
000, 001, 002, ..., 999
000, 001, 002, ..., 999