A lady went to a bank with ₹ 1000. She asked the cashier to give her ₹ 10 and ₹ 50 currency notes in return. She got 40 currency notes in all. Find the number of each kind of currency notes.
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Science is the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence. Scientific methodology includes the following: ... Evidence. Experiment and/or observation as benchmarks for testing hypotheses.
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