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If P – Q – R and d(P, Q) = 2, d(P, R) = 10, then find d(Q, R). (A) 12 (B) 8 (C) √96 (D) 20

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If P – Q – R and d(P, Q) = 2, d(P, R) = 10, then find d(Q, R). 

(A) 12 

(B) 8 

(C) √96 

(D) 20

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(B) 8

d(P, R) = d(P, Q) + d(Q, R) 

∴ 10 = 2 + d(Q, R) 

∴ d(Q, R) = 8

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