The above mentioned pictures are the Most commonly found Pictures of Hindu Gods, across almost all the homes of India.
The Following is the Significance and reasons on why these are the most commonly found Pictures in the homes of India
Ganesha: Among all the Gods of Hinduism, Ganesha is worshiped First before the start of any new thing, to the matter of the fact even the start of the day is started by offering the first prayer to Ganesha
Saraswati Mata: Saraswati Mata is the goddess of Education, Gyan, Knowledge, Music & Arts, She is known as the Consort of Brahma, and the start of all Good things in this world. The Pictures are always portrayed with Wither Music Instruments Like Veena or with Books sitting on Swan.
Lakshmi Devi: Lakshmi Devi is the goddess of Prosperity, Wealth & Happiness, it is strongly believed that worshiping Lakshmi Devi will relieve them from bad luck and protect them from Money related sorrows, she is the also known as the consort of Lord Vishnu.