7. A medical trial into the effectiveness of a new medication was carried out. 120 females and 90 males took part in the trial. Out of those people, 50 females and 30 males responded positively to the medication. Given below is a contingency table with the given information filled in. Female Male Total Positive 30 Negative Total 50 120 90 (a) What is the probability that the medicine gives a negative result? (2 marks) (b) What is the probability that the medicine gives a positive result given that the participant was a female? (2 marks) 3 (c) What is the probability that the medicine gives a negative result or participant was a male? (2 marks) (d) Was the medication's success independent of gender? Explain. (2 marks)