A Biology Instructor Gives Her Class a List of Eight $\frac { 23 } { 28 }$

Multiple Choice

A biology instructor gives her class a list of eight study problems, from which she will select five to be answered on an exam. A student knows how to solve six of the problems. Find the probability that the student will be able to answer all five questions on the exam.

A) $\frac { 23 } { 28 }$
B) $\frac { 3 } { 28 }$
C) $\frac { 11 } { 14 }$
D) $\frac { 1 } { 28 }$
E) $\frac { 27 } { 28 }$