The average weight of X, Y and Z is 50 kg. The average weight of X and Y is 44.5 kg and the average weight of Y and Z is 53.5 kg. If the weights of X, Y and Z are p, q and r, respectively, then the value of \(\rm \frac{p+q}{r}\) correct to two decimal places, is ______.
1
1.46
2
0.45
3
0.95
4
1.55