A student has ₹500 in her savings bank account. She gets ₹150 every month as pocket money. Class 9
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A student has ₹500 in her savings bank account. She gets ₹150 every month as pocket money. Class 9
Question 1.
A student has ₹500 in her savings bank account. She gets ₹150 every month as pocket money. How much money will she have at the end of every month from the second month onwards? Find a linear expression to represent the amount she will have in the nth month. Class 9
Solution:
Initial amount in savings bank account = ₹500
Monthly pocket money = ₹150
| Month (n) | Money at end of month |
| 2 | 500 + 150 × 2 = ₹800 |
| 3 | 500 + 150 × 3 = ₹950 |
| 4 | 500 + 150 × 4 = ₹1100 |
| ... | ... |
| n | 500 + 150n |
∴ The linear expression to represent the amount she will have in the nth month is, ₹ (500 + 150n).