Relative frequency = (individual value/total values) * 100
For the value "20": 20/10 + 15 + 20 + 10 + 20 + 30 + 10 + 50 +60 + 70) * 100 = 7.14%
For the value "60": 60/10 + 15 + 20 + 10 + 20 + 30 + 10 + 50 +60 + 70) * 100 = 21.43%
For the value "50": 50/10 + 15 + 20 + 10 + 20 + 30 + 10 + 50 +60 + 70) * 100 = 17.86%
For the value "10": 10/10 + 15 + 20 + 10 + 20 + 30 + 10 + 50 +60 + 70) * 100 = 3.57%
Since none of these values are 30%, the answer is no value in the given data set will produce a relative frequency of 30%.