Waec Model Questions Vol1 2019 Government Question 12

A country uses a mixed‑member proportional (MMP) system for its 100‑seat legislature. There are 60 constituency seats filled by first‑past‑the‑post and 40 list seats allocated proportionally. Four parties obtain the following total votes nationwide: Party A - 500,000 votes; Party B - 300,000 votes; Party C - 150,000 votes; Party D - 50,000 votes. A 5 % electoral threshold applies (parties with less than 5 % of the total valid votes are excluded from the list allocation). The parties have already won the following constituency seats: Party A - 30 seats; Party B - 20 seats; Party C - 10 seats; Party D - 0 seats. Using the simple proportional formula (list seats = (party votes / total votes of parties that passed the threshold) × 40, rounded to the nearest whole number), calculate the total number of seats that Party B will hold after the list seats are allocated.