Solve the Problem $\frac { 1 } { 16 }$ B) $\frac { 1 } { 20 }$

Multiple Choice

Solve the problem.
-A couple plans to have four children. Using a tree diagram , obtain the sample space. Then, find The probability that the family has no boys.

A) $\frac { 1 } { 16 }$
B) $\frac { 1 } { 20 }$
C) $\frac { 1 } { 8 }$
D) $\frac { 15 } { 16 }$