Jatin got 8 marks in his first exam and 15 marks in his 15th exam. If all his marks follows an arithmetic progression with a positive common difference.
(i) Find the common difference *
1 point
(a) 0.5
(b) 2.5
(c) 3.2
(d) 1.5
(ii) Based on solution of above question, in which exam did he get 18 marks? *
2 points
(a) 12
(b) 21
(c) 13
(d) 32
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