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प्रश्न
If for the matrix A, A3 = I, then A−1 = _____________ .
पर्याय
A2
A3
A
none of these
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उत्तर
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| To raise money for an orphanage, students of three schools A, B and C organised an exhibition in their residential colony, where they sold paper bags, scrap books and pastel sheets made by using recycled paper. Student of school A sold 30 paper bags, 20 scrap books and 10 pastel sheets and raised ₹ 410. Student of school B sold 20 paper bags, 10 scrap books and 20 pastel sheets and raised ₹ 290. Student of school C sold 20 paper bags, 20 scrap books and 20 pastel sheets and raised ₹ 440. |
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- Hence, find the cost of one paper bag, one scrap book and one pastel sheet.
