WAEC Mathematics 2011 Paper

Concept:The value of a digit in a decimal number depends on its position after the decimal point.Explanation:In $42.7531$, the digits after the decimal point are $7$, $5$, $3$, and $1$.The first digit after the decimal point is the tenths place.So $7$ has the value $\frac{7}{10}$.The second digit is the hundredths place, so $5$ has the value $\frac{5}{100}$.The third digit is the thousandths place.Therefore, the digit $3$ is in the thousandths place and its value is $\frac{3}{1000}$.Answer:$\frac{3}{1000}$ (Option B)