Assume that a researcher randomly selects 14 newborn babies and counts the number of girls selected, x. The probabilities
corresponding to the 14 possible values of x are summarized in the given table. Answer the question using the table. $$\begin{array}{l}
\text { Probabilities of Girls }\
\begin{array} { | c | c | c | c | c | c | }
\hline x \text { (girls) } & P ( x ) & x \text { (girls) } & P ( x ) & x \text { (girls) } & P ( x ) \
\hline 0 & 0.000 & 5 & 0.122 & 10 & 0.061 \
1 & 0.001 & 6 & 0.183 & 11 & 0.022 \
2 & 0.006 & 7 & 0.210 & 12 & 0.006 \
3 & 0.022 & 8 & 0.183 & 13 & 0.001 \
4 & 0.061 & 9 & 0.122 & 14 & 0.000 \
\hline
\end{array}
\end{array}$$
-Find the probability of selecting 2 or more girls.
A) 0.994
B) 0.006
C) 0.001
D) 0.999

Question

Assume that a researcher randomly selects 14 newborn babies and counts the number of girls selected, x. The probabilities
corresponding to the 14 possible values of x are summarized in the given table. Answer the question using the table. $$\begin{array}{l}
\text { Probabilities of Girls }\
\begin{array} { | c | c | c | c | c | c | } 
\hline x \text { (girls) } & P ( x ) & x \text { (girls) } & P ( x ) & x \text { (girls) } & P ( x ) \
\hline 0 & 0.000 & 5 & 0.122 & 10 & 0.061 \
1 & 0.001 & 6 & 0.183 & 11 & 0.022 \
2 & 0.006 & 7 & 0.210 & 12 & 0.006 \
3 & 0.022 & 8 & 0.183 & 13 & 0.001 \
4 & 0.061 & 9 & 0.122 & 14 & 0.000 \
\hline
\end{array}
\end{array}$$
-Find the probability of selecting 2 or more girls.
A) 0.994
B) 0.006
C) 0.001
D) 0.999

Quizplus · Accepted Answer

To find the probability of selecting 2 or more girls, we need to add up the probabilities of selecting 2 girls, 3 girls, 4 girls, and so on up to 14 girls. We can simplify this by finding the probability of selecting 0 or 1 girl and subtracting this from 1 (because if we don't select 0 or 1 girl, we must select 2 or more). 
So, P(selecting 2 or more girls) = 1 - (P(selecting 0 girls) + P(selecting 1 girl)) 
= 1 - (0.000 + 0.001) 
= 0.999 
Therefore, the answer is D.

Assume That a Researcher Randomly Selects 14 Newborn Babies and Counts