Question

In a stadium of 10 thousand capacity, except
100 seats all were sold. In this 20% are sold
on 50% of the value and remaining were sold
on full price of 20. Then find the total collection from tickets.​

Answer 1

equation 1 - amount of seats - 10000

equation 2 amount of money collected by 100 seats(*)

equation(1*2)- (20 × 10 + 80 × 20)

requation-200+1600=1800

now this is the money for 100 seats and we have 10000 seats

we notice that 100 seats is 1% of 10000

SO, 1800 × 100 = 1% × 100% = 180000(CURRENCY) OF 100%

The total collection of money from tickets was 180,000(currency)