in a survey it was found that it is people drink at least one of the three drinks coffee milk tea and black tea among them 40% of the people drink only two drinks 15% in all three drinks and 54 people drink only one drink find the number of the people participated in the survey​

Kilgore trout creates a new scale to diagnose depression. however, his scale only assesses one symptom of depression while ignoring others. which of the following is his new scale most likely lacking? a) test-retest reliability b) discriminant validity c) criterion validity d) alternate-forms reliability e) content validity f) none of the above