The theatre had 1272 seats. There were 40% fewer $25-seats than $10-seats. 80% of the $10-seats and some $25-seats were sold. A total of $16160 was collected. How many seats were unsold?

	$25	$10	Total
Number	3 u	5 u	8 u

100% - 40% = 60%
⁶⁰₁₀₀ = ³₅

Total number of seats
= 3 u + 5 u
= 8 u

8 u = 1272

1 u = 1272 ÷ 8 = 159

Total number of $10-seat tickets
= 5 u
= 5 x 159
= 795

Number of $10-seat tickets sold
= 80% x 795
= ⁸⁰₁₀₀ x 795
= 636

Amount collected from $10-seat tickets sold
= 636 x 10
= $6360

Amount collected from $25-seat tickets sold
= 16160 - 6360
= $9800

Number of $25-seat tickets sold
= 9800 ÷ 25
= 392

Number of tickets sold
= 636 + 392
= 1028

Number of tickets left unsold
= 1272 - 1028
= 244

Answer(s): 244