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Ratio of P, Q, R and S is 2:3:6:7 respectively, According to the question, ⇒ R = 2850 + 3x ⇒ 6x = 2850 + 3x ⇒ 3x = 2850 ⇒ x = 950 ⇒ Total amount of P and S together = 2x + 7x = 9x = 9 x 950 = Rs. 8550
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