The numbers 3, 2, 8, 5, 7, 12, 9 and 14 are the marks scored by a group of students in a class test. If P is scored by an group of students in a class test....

Question 1 Report

The numbers 3, 2, 8, 5, 7, 12, 9 and 14 are the marks scored by a group of students in a class test. If P is scored by an group of students in a class test. If P is the mean and Q the median, the P + Q is

18

17

\frac{1}{2}

16

15

Answer Details

Re-arranging them 2, 3, 5, 7, 8, 9, 12, 14
Mean = P and median = Q
P = $\frac{2 + 2 + 5 + 7 + 8 + 9 + 12 + 14}{8}$
$\frac{60}{8}$ = 7.5
median (Q) = $\frac{7 + 8}{2}$
$\frac{15}{2}$ = 7.5
P + Q = 7.5 + 7.5 = 15

Read lesson note on Number Bases (WAEC)

Number Bases

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