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Total cost of the bike for Amit = 18000 × 1.20 = Rs. 21,600 Amount paid by Chaman = 21600 × 1.25 = Rs. 27,000
The average score of a student increased by 5 marks when he scored 210 marks in his 60th test. Find the average score of the student after 60 tests.
The average age of (x + 7) trainees is 17 years. When a 39-year-old trainer joins, the average becomes 18 years. Find x% of 500.