Math Problem Statement
what percentage of the numbers from 101 to 1000 have 9 in the unit's digit
a)10%
b12%
c15%
d20%
Solution
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Math Problem Analysis
Mathematical Concepts
Arithmetic Sequences
Percentage Calculation
Formulas
nth term of an arithmetic sequence: a_n = a + (n  1)d
Percentage formula: Percentage = (Number of desired outcomes / Total outcomes) * 100
Theorems

Suitable Grade Level
Grades 68