Four tasks (A, B, C, D) are scheduled on four days (1, 2, 3, 4), one task per day. - A is before B. - C is not on day 1. - D is on day 3 or 4. - B is not on day 4.
Four students (A, B, C, D) are assigned to four projects (P1, P2, P3, P4), one each. - A does not get P1. - B gets P2 or P3. - C does not get P3. - D gets P4.
A shop sells three items: X, Y, Z. In January, X sold 100 units at Rs. 50/unit, Y sold 80 units at Rs. 60/unit, Z sold 50 units at Rs. 40/unit. In February, X’s units increased by 20%, Y’s by 25%, Z’s by 10%. Prices remain the same.