Raj goes to a store to purchase fruits for his shop. The store has \(40\) lemon, \(45\) cartons of pineapple, \(35\) mangoes and \(30\) banans. If Raj chooses a fruit at random.
Based on the above information, solve the following questions:
1. Find the probability that the selected pineapple.
2. What is the probability that selecting banana?
3. Raj buys \(6\) pineapple, \(4\) lemons and \(4\) banans. A customer comes to Raj's shop and picks a tetrapack of fruits at random. Find the probability that the customer picks a banana, if each fruits has \(10\) tetrapacks of fruits.