A concert is organised to earn the revenue of ₹ 1,80,000 which can be distributed among the needy people during the period of Covid-19. The concert hall has 4,000 seats which are divided into two sections A and B . The cost of a ticket in Section A is ₹50 and that of Section B is ₹40. All the seats are occupied.

Attempt Question:
The value of x will be equal to `A^(-1)B` , then `A^(-1)`:

Options

A. `[(-4,1),(-5,1)]`
B. `[(-4,1),(5,-1)]`
C. `[(4,-5),(-1,1)]`
D. `[(-4,5),(-1,-1)]`

Answer

B