Explanation:

Council of Ministers are collectively responsible to the LokSabha and Ministers are Individually responsible to President of India.Council of ministers cannot exist without the Prime Minister. (Each minister need not resign separately; the resignation of the prime minister amounts to the resignation of the entire council of ministers.).Council of Ministers shall not exceed 15 percent of the total number of members of the House of People.
Article 74—Council of Ministers to aid and advise President
1. There shall be a Council of Ministers with the Prime Minister at the head to aid and advise the President who shall, in the exercise of his functions, act in accordance with such advice. However, the President may require the Council of Ministers to reconsider such advice and the President shall act in accordance with the advice tendered after such reconsideration.
2. The advice tendered by Ministers to the President shall not be inquired into in any court.
Article 75—Other Provisions as to Ministers
1. The Prime Minister shall be appointed by the President and the other Ministers shall be appointed by the President on the advice of the Prime Minister.
2. The total number of ministers, including the Prime Minister, in the Council of Ministers shall not exceed 15% of the total strength of the Lok Sabha. The provision was added by the 91st Amendment Act of 2003.
3. A member of either house of Parliament belonging to any political party who is disqualified on the ground of defection shall also be disqualified to be appointed as a minister. This provision was also added by the 91st Amendment Act of 2003.
4. The ministers shall hold office during the pleasure of the President.
5. The council of ministers shall be collectively responsible to the Lok Sabha.
6. The President shall administer the oaths of office and secrecy to a minister.