Simplify the following text for a Grade 10 native English-speaking person.
Original: The Governor-General of India ( or , from 1858 to 1947 , the Viceroy and Governor-General of India ) was the head of the British administration in India , and later , after Indian independence , the representative of the monarch and de facto head of state .
Simplified: The Governor-General of India was the head of the British administration in British India .