JAMB Mathematics 2013 Paper

Concept:Use the mean to find the missing number, then identify the mode as the most frequent value.Explanation:Total sum of all seven numbers = mean $\times$ count = $10 \times 7 = 70$.Sum of the six given numbers: $2 + 4 + 8 + 14 + 16 + 18 = 62$.Missing number = total sum $-$ sum of the six given numbers = $70 - 62 = 8$.Hence the seven numbers are $2, 4, 8, 8, 14, 16, 18$.The number $8$ appears twice, while every other number appears once.Therefore, the mode is $8$.Answer:$8$ (Option B)