Zak is going to buy some bookcases and some lamps to sell in his shop. Each bookcase costs £16 Each lamp costs £12 Zak has a maximum of £360 to spend. He is going to buy x bookcases. He is going to buy y lamps. Show that 4 x + 3 y ≤ A where A is a constant to be found

Asix-sided die of unknown bias is rolled 20 times, and the number 3 comes up 6 times. in the next three rounds (the die is rolled 20 times in each round), the number 3 comes up 6 times, 5 times, and 7 times. the experimental probability of rolling a 3 is 10 %, which is approximately % more than its theoretical probability. (round off your answers to the nearest integer.)