The sum of fourth and twelfth term of an arithmetic progression is 20. What is the sum of the first fifteen terms of that arithmetic progression?

The sum of fourth and twelfth term of an arithmetic progression is 20. What is the sum of the first fifteen terms of that arithmetic progression? ?

Created: 1 year ago | Updated: 1 week ago | Created By:

samia noon

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Institution: Bangladesh House Building Finance Corporation (BHBFC) Exam: Bangladesh House Building Finance Corporation (BHBFC) - Senior Officer - 20.10.2017 ||
Topic: Mathematics (সাধারণ গণিত) Subject: Mathematics (সাধারণ গণিত)

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The sum of fourth and twelfth term of an arithmetic progression is 20. What is the sum of the first fifteen terms of that arithmetic progression? ?

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