Generally, the Centers for Disease Control and Prevention (CDC) studies show that there are more boys born than girls. In a recent group of 500 births, there were 405 boys born.
a. What fraction of the babies born were boys?
b. What fraction of the babies born were girls?
A) a. $\frac { 81 } { 100 }$ b. $\frac { 19 } { 100 }$
B) a. $\frac { 38 } { 50 }$ b. $\frac { 95 } { 100 }$
C) a. $\frac { 45 } { 50 }$ b. $\frac { 53 } { 50 }$
D) a. $\frac { 53 } { 50 }$ b. $\frac { 45 } { 50 }$
E) a. $\frac { 95 } { 100 }$ b. $\frac { 38 } { 50 }$

Question

Generally, the Centers for Disease Control and Prevention (CDC) studies show that there are more boys born than girls. In a recent group of 500 births, there were 405 boys born. 
a. What fraction of the babies born were boys?
b. What fraction of the babies born were girls?
A) a. $\frac { 81 } { 100 }$ b. $\frac { 19 } { 100 }$
B) a. $\frac { 38 } { 50 }$ b. $\frac { 95 } { 100 }$
C) a. $\frac { 45 } { 50 }$ b. $\frac { 53 } { 50 }$
D) a. $\frac { 53 } { 50 }$ b. $\frac { 45 } { 50 }$
E) a. $\frac { 95 } { 100 }$ b. $\frac { 38 } { 50 }$

Quizplus · Accepted Answer

a. The fraction of babies born who were boys is $\frac{405}{500}$, which simplifies to $\frac{81}{100}$. b. Since there were 500 births in total and 405 were boys, 95 must have been girls, making the fraction of girls $\frac{95}{500}$ or $\frac{19}{100}$.

Generally, the Centers for Disease Control and Prevention (CDC) Studies 81100\frac { 81 } { 100 }10081​

Generally, the Centers for Disease Control and Prevention (CDC) Studies $\frac { 81 } { 100 }$