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Revision as of 08:31, 21 March 2026
A mattress store sells only king, queen and twin-size mattresses. Sales records at the store indicate that the number of queen-size mattresses sold is one-fourth the number of king and twin-size mattresses combined. Records also indicate that three times as many king-size mattresses are sold as twin-size mattresses.
Calculate the probability that the next mattress sold is either king or queen-size
- 0.12
- 0.15
- 0.80
- 0.85
- 0.95
Copyright 2023 . The Society of Actuaries, Schaumburg, Illinois. Reproduced with permission.