PP 19-20. A study was conducted in a large population of adults concerning eyegl

Question

PP 19-20. A study was conducted in a large population of adults concerning eyeglasses for correcting reading vision. Based on an examination by a qualified professional the individuals were judged as to whether or not they needed to wear glasses for reading. In addition, it was determined whether or not they were currently using glasses for reading. The following table provides the proportions found in the study Used Glasses for Reading es 0.42 0.04 No 0.18 Judged to need glasses: Yes PROBLEM 20 What is the probability that the selected adult is judged to need eyeglasses or uses them for reading a. 0.64 b. 1.06 c. 0.42 d. 0.46

Explanation / Answer

Solution:-

=> option D. 0.46

=> 0.42+0.04 = 0.46

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