An Unprepared Student Must Take a 7-Question, Multiple-Choice Test That

question 45

Multiple Choice

An unprepared student must take a 7-question, multiple-choice test that has 5 possible answers per question. If the student can eliminate two of the possible answers on the first three questions, and if she guesses on every question, what is the probability that she will answer at least one question correctly? ​

• A) Pr(at least 1 correct) =
• B) Pr(at least 1 correct) =
• C) Pr(at least 1 correct) =
• D) Pr(at least 1 correct) =
• E) Pr(at least 1 correct) =

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Definitions:

Right Of Survivorship

A feature of some types of co-ownership of property causing a co-owner’s interest in property to be transferred on his death immediately and by operation of law to his surviving co-owner(s). See also tenancy by the entirety and joint tenancy.

Tenancy In Common

A form of co-ownership of property that is freely disposable both during life and at death, and in which the co-owners have undivided interests in the property and equal rights to possess the property.

Right Of Survivorship

A legal principle in property law where, upon the death of one owner, the ownership interest of the deceased automatically transfers to the surviving owner(s) without the need for probate.

Community Property

A form of ownership between spouses in which property acquired during marriage is owned equally by both parties.