Waec 2022 Mathematics Question 10

Practice essay / theory question 10 from the 2022 Waec Mathematics examination. This question covers Algebra / Word Problems, Statistics .

Waec 2022 Mathematics Essay / Theory 3 Difficulty

Topics: Algebra / Word Problems Statistics

Question 10 WAEC • 2022 • MATHEMATICS • essay

\( \begin{array}{|l|c|c|c|c|c|c|c|c|} \hline \text{Age (years)} & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 \\ \hline \text{Number of Children} & 2 & 6 & 5 & x & 6 & 9 & 8 & 5 \\ \hline \end{array} \) The table shows the distribution of ages of a number of children in a school. If the mean of the distribution is 7, find the:

( a )

value of \( x \);

( b )

standard deviation of their ages.

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This is Waec 2022 Mathematics Question 10. It is one of the essay questions from the 2022 Waec Mathematics examination.

The question covers Algebra / Word Problems, Statistics .

Difficulty level: 3 .

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