CHAPTER TEST 10 notebooks cost 150. What is the cost of 20 notebooks? Cost of 3 geometry hoxes is 33 How many Cort Foon trybos
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cost of 10 notebook = 150 rs.
cost of 1 notebook = 150÷10 = 15rs .
cost of 20 notebooks = 15 × 20
= 300 rs
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