Four Boys and Three Girls Are Seated, in a Row $\frac { 1 } { 7 }$

Multiple Choice

Four boys and three girls are seated, in a row, at random, to watch a play. What is the probability that
a) a girl is seated at each end of the row?
b) one of the boys is seated in the middle seat?
c) boys and girls are seated alternately?

A) a) $\frac { 1 } { 7 }$ b) $\frac { 3 } { 7 }$ c) $\frac { 1 } { 35 }$
B) a) $\frac { 1 } { 7 }$ b) $\frac { 4 } { 7 } \quad$ c) $\frac { 1 } { 35 }$
C) a) $\frac { 3 } { 7 }$ b) $\frac { 4 } { 7 }$ c) $\frac { 1 } { 7 }$
D) a) $\frac { 2 } { 7 }$ b) $\frac { 1 } { 7 } \quad$ c) $\frac { 1 } { 35 }$