Consider the following sample of numbers: 9, 18, 11, 14, 15, 17, 10, 69, 11, 13. The median of the sample is

The number of different coins that a person has are in the ratio 5:3:13. Of these, 25% are 1 rupee coins. The percentage of 50 paise coins is

For positive non-zero real variables p and q, if log(p2+q2) = log p + log q + 2 log 3, then the value of (p4 + q4) / (p2q2) is