| If p, q, r are in Geometric Progression, then which is true among the following? [SSC (CGL) 2012] |
A) \[q=\frac{p+r}{2}\]
B) \[{{p}^{2}}=qr\]
C) \[q=\sqrt{pr}\]
D) \[\frac{p}{r}=\frac{r}{q}\]
Correct Answer: C
Solution :
| Since, p, q, r, are in Geometric progression. |
| \[\therefore \] \[{{q}^{2}}=pr\] |
| Then, \[q=\sqrt{pr}.\] |
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