The majority of Muslims belong to what group

The majority of Muslims belong to the Sunni group. Approximately 85-90% of Muslims are Sunni, while the remaining 10-15% are Shi'a.

What group believes the Quran as the holy book of Islam

Both Sunni and Shi'a Muslims believe that the Quran is the holy book of Islam and the primary source of guidance in their faith. The difference between the two groups lies in the interpretation and understanding of Islamic history and leadership after the Prophet Muhammad's death.

To determine the majority group in any religious community, we need to consider various factors such as demographics, geography, and the distribution of religious sects within that community.

In the case of Islam, the majority group is Sunni Muslims. Sunni Islam is the largest branch of Islam, comprising the majority of the global Muslim population. It is estimated that around 85-90% of Muslims worldwide are Sunni. It is practiced in many countries, including Saudi Arabia, Egypt, Turkey, Indonesia, and Pakistan.

To ascertain this information, you can refer to reliable sources such as government census data, surveys, and academic studies on religious demographics. These sources often provide accurate and up-to-date information on the distribution of different religious groups within a particular community or country. Additionally, organizations like the Pew Research Center and religious institutions may also conduct studies and surveys on global religious demographics, which can be helpful in understanding the current distribution of Muslims belonging to different groups.