How many numbers are there between 100 and 1000 such that 7 is in the unit's place?
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9×10×1=90.Ans.
Step-by-step explanation:
All the no. b/w 100 and 1000 will be 3-digit no.
unit place is fixed .i.e no. just before decimal .i.e hundred place=7
therefore, unit place can have 1 no.
ten's place can have all no. from 0-9
therefore, ten's place can have 10 no.
one's place can have no. from 1-9,
since, a no. starting from 0 will be a 2-digit no.
therefore, one's place can have 9 no.
Ans. 9×10×1=90
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