Peter's weekly wages are ₦20.00 for the first 20 weeks and ₦36.00 for the next 24 weeks. Find his average weekly wage for the remaining 8 weeks of the year if his average weekly wage for the whole year is ₦30.00.
Worked solution (try it first)
A year has 52 weeks, so the year's total at an average of ₦30 is 52×30=1560 naira.
The first 44 weeks earn 20×20+24×36=400+864, which is ₦1264.
That leaves 1560−1264=296 naira for the last 8 weeks.
So the average there is 296÷8=37, which is ₦37.00, option A.