Final answer:
The details in the question appear to be about an exam's score distribution and percentiles rather than the K10 well-being scale. The K10 scale measures emotional well-being and has a score range of 10-50, with cutoffs indicating levels of distress, not determine eligibility like job selection cutoff scores.
Step-by-step explanation:
The K10 is a scale intended to measure a person's emotional well-being based on a series of questions. You have asked about the cutoffs and range for K10 scores. However, the details provided in your question appear to pertain to a different assessment, possibly an exam score distribution, rather than the K10 well-being scale. For instance, the mention of the 90th percentile being 69.4 does not align with K10 scoring. In the context of exam scores, finding the 70th percentile would involve identifying the score k below which 70 percent of scores fall.
In the provided example of job selection processes, cutoff scores are employed to determine if an applicant is eligible for the next phase of the assessment. This concept is quite different from the K10 emotional well-being assessment, which uses a scoring system where higher scores indicate more severe distress and there are no cutoff scores for 'eligibility' per se.
However, to address your initial query, neither of the options a) through d) accurately represent typical K10 cutoff scores. The K10 has a scoring range of 10-50, with higher scores indicating a higher likelihood of having a mood or anxiety disorder. The cutoff points are commonly used to indicate different levels of distress but do not follow the options presented (a-d).