A Certain Dataset Contains Two Classes Class a and Class

Multiple Choice

A certain dataset contains two classes class A and class B each having 100 instances. RuleMaker generates several rules for each class.
One rule for class A is given as att1 = value1
# covered = 20
# remaining =60
What percent of the class A instances are covered by this rule?

A) 20
B) 40
C) 60
D) 70
E) 80