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Select the correct answer.

Based on the data in this two-way table, if a flower is picked at random, what is the probability of getting a yellow flower?

\begin{tabular}{|c|c|c|c|c|}
\hline Type of Flower/Color & Red & Pink & Yellow & Total \\
\hline Rose & 40 & 20 & 45 & 105 \\
\hline Hibiscus & 80 & 40 & 90 & 210 \\
\hline Total & 120 & 60 & 135 & 315 \\
\hline
\end{tabular}

A. 0.190
B. 0.333
C. 0.381
D. 0.429

Sagot :

To determine the probability of picking a yellow flower at random, follow these steps:

1. Identify the total number of yellow flowers:
From the table, we see that there are 45 yellow roses and 90 yellow hibiscuses. Adding these, we get:
[tex]\[ 45 + 90 = 135 \][/tex]
So, there are 135 yellow flowers in total.

2. Identify the total number of flowers:
From the table, summing up all the flowers of each color and type, we get:
[tex]\[ 120 \, (\text{Red}) + 60 \, (\text{Pink}) + 135 \, (\text{Yellow}) = 315 \][/tex]
Thus, the total number of flowers is 315.

3. Calculate the probability of picking a yellow flower:
The probability [tex]\( P \)[/tex] of selecting a yellow flower is given by the ratio of the number of yellow flowers to the total number of flowers:
[tex]\[ P(\text{Yellow}) = \frac{\text{Number of Yellow Flowers}}{\text{Total Number of Flowers}} = \frac{135}{315} \][/tex]
Simplifying this fraction:
[tex]\[ \frac{135}{315} \approx 0.42857142857142855 \][/tex]

4. Selecting the correct answer:
Looking at the choices given:
- A. 0.190
- B. 0.333
- C. 0.381
- D. 0.429

The closest value to our calculated probability [tex]\( 0.42857142857142855 \)[/tex] is 0.429.

Therefore, the correct answer is:
D. 0.429