Final answer:
The defeat of the French in the Seven Years' War drove the British out of India.
Step-by-step explanation:
The British were eventually driven out of India by the defeat of the French in the Seven Years' War. The French and British were engaged in a conflict called the French and Indian War, which spread to Europe and India. The British emerged victorious in this war and their victory in India left the French unable to compete for control of Indian trade.