WAEC Mathematics 2016 Paper

Concept:The median is the middle value of a frequency distribution. For grouped frequency data, locate the position using cumulative frequency.Explanation:Total frequency, $N = 10 + 24 + 8 + 5 + 3 = 50$.Since $N = 50$ is even, the median lies between the $25$th and $26$th values.Cumulative frequency up to age 13 is $10$.Cumulative frequency up to age 14 is $10 + 24 = 34$.This means both the $25$th and $26$th values fall in the age group 14.Thus, the median age is $14$ years.Answer:B. 14