Ratio of P, Q, R and S is 3:4:8:9respectively, According to the question, ⇒ R = 2600 + 4x ⇒ 8x = 2600 + 4x ⇒ 4x = 2600 ⇒ x = 650 ⇒ Total amount of P and S together = 3x + 9x = 12x = 12 x 650 = Rs. 7800
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