Question

Assuming that for a husband-wife couple the chances of their child being a boy or a girl are the same, the probability of their two children being a boy and a girl is

• A. $\frac { 1 } { 4 }$
• B. 1
• C. $\frac { 1 } { 2 }$
• D. $\frac { 1 } { 8 }$

Answer 1

Answer: (C)

$\frac { 1 } { 2 }$

Answer 2

The chance of being a boy or girl $p = \frac { 1 } { 2 }$ $q = \frac { 1 } { 2 }$

Total child = 2, Number of boys = 1

$P$ (1 boys, 1 girl)