A) \[\frac{PQ+QR+PR}{3}\]
B) \[\frac{PQ+PR}{3}\]
C) \[\frac{PQ+QR+PR}{9}\]
D) \[\frac{PQ+PR}{9}\]
E) \[\frac{PQ+QR}{3}\]
Correct Answer: B
Solution :
\[{{X}_{CM}}=\frac{3\times 0+3\times PQ+3\times PR}{3+3+3}\] \[=\frac{3(PQ+PR)}{9}\] \[=\frac{PQ+PR}{3}\]You need to login to perform this action.
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