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Q7. In a new year, Reenu saved Rs. 50 in the 1st week and then increased  her weekly saving by Rs. 17.50. If in the nth week, her weekly saving becomes ₹207.50, find the value of n.

Arithmetic Progressions (Part 3) | Arithmetic Progressions| CBSE | Class 10 | Math

Q5. A sum of Rs.1000 is invested at 8% simple interest per annum. Calculate the interest at the end of 1,2,3,....years. If the sequences of interests an AP? Find the interest at the end of 30 years.

Q6. Tanvy joined her job in a campany in the year 2015 on a monthly salary of Rs. 40000 with an annual increment of Rs. 2500. In which year will she get Rs. 65000 as monthly salary?