Understanding India's Non-Permanent UNSC Membership Duration

The question asks for the total duration India served as a non-permanent member of the United Nations Security Council (UNSC) up to September 2018. The UNSC has 10 non-permanent members elected for two-year terms.

India's Terms on the UN Security Council

India has been elected as a non-permanent member of the UNSC multiple times. To find the total term duration, we need to list these periods and sum the years:

• 1950-1951 (2 years)
• 1967-1968 (2 years)
• 1972-1973 (2 years)
• 1977-1978 (2 years)
• 1984-1985 (2 years)
• 1991-1992 (2 years)
• 2011-2012 (2 years)

Calculating Total Membership Years

We sum the duration of each term India served:

Total Years = (1951 - 1950 + 1) + (1968 - 1967 + 1) + (1973 - 1972 + 1) + (1978 - 1977 + 1) + (1985 - 1984 + 1) + (1992 - 1991 + 1) + (2012 - 2011 + 1)

Using a simpler notation for duration:

Total Years = 2 years + 2 years + 2 years + 2 years + 2 years + 2 years + 2 years

Performing the addition:

Total Years = $2 + 2 + 2 + 2 + 2 + 2 + 2 = 14$ years.

Therefore, up to September 2018, India had completed a total of 14 years as a non-permanent member of the UN Security Council.

Conclusion on UNSC Membership

Based on the calculation of India's multiple terms served, the total duration amounts to 14 years before the specified date (September 2018).