Question

An advertising agency surveys a random sample of women aged 18-30. Suppose that 40% of respondents indicated that they wore neither a ring nor a necklace to work. If 50% of the women who responded wear a ring, and 20% wear a necklace, then (a) what percentage wear some form of jewelry (a ring or a necklace)? (b) what percentage wear both forms of jewelry (a ring and a necklace)? (c) what percentage of students wearing a necklace also wear a ring? (d) what percentage of students wearing a ring also wear a necklace? (e) are ring wearing and necklace wearing independent events according to the results of this survey?

Answer 1