lori downloaded all the pictures she took at ritas wedding into a single computer folder. she took 86 of the…

Answer:

B. 13%

Explanation:

Step1: Calculate phone - taken pictures

The number of pictures taken with the cell phone is $134 - 86=48$.

Step2: Calculate blurry phone - taken pictures

Since one - out of every five cell - phone pictures is blurry, the number of blurry cell - phone pictures is $\frac{48}{5}=9.6$.

Step3: Calculate the probability

The probability $P$ that a randomly opened picture is a blurry cell - phone picture is $P=\frac{9.6}{134}\approx0.0716$. As a percentage, $0.0716\times100 = 7.16%$. To the nearest whole percent, it is 7%. But there is a mistake above. We should calculate the probability of blurry cell - phone pictures among cell - phone pictures only. The correct way:

Step1: Calculate blurry phone - taken pictures

The number of pictures taken with the cell phone is $134 - 86 = 48$. Since one - out of every five cell - phone pictures is blurry, the number of blurry cell - phone pictures is $\frac{48}{5}=9.6$.

Step2: Calculate the probability among cell - phone pictures

The probability $P$ that a randomly opened cell - phone picture is blurry is $P=\frac{\frac{48}{5}}{48}=\frac{1}{5}=0.2$ as a proportion. As a percentage, $0.2\times100 = 20%$ (wrong again). The correct steps:

Step1: Calculate number of phone pictures

Number of pictures taken with phone is $134 - 86=48$.

Step2: Calculate number of blurry phone pictures

Number of blurry phone pictures is $\frac{48}{5}=9.6\approx10$ (rounding to whole number).

Step3: Calculate probability

Probability $P=\frac{10}{134}\times100\approx7.46%$. But if we calculate probability of blurry phone pictures among phone pictures only: Number of phone pictures $n = 134 - 86=48$. Number of blurry phone pictures $m=\frac{48}{5}=9.6\approx10$. Probability of blurry phone picture among phone pictures is $\frac{10}{48}\times100=\frac{1000}{48}\approx20.83%$. If we calculate probability of blurry phone picture among all pictures: Number of phone pictures $=134 - 86 = 48$. Number of blurry phone pictures $=\frac{48}{5}=9.6\approx10$. Probability $P=\frac{10}{134}\times100\approx7.46\approx7%$ (first wrong approach). The correct way considering probability of blurry phone pictures among phone pictures:

Step1: Determine number of phone pictures

$134−86 = 48$.

Step2: Determine number of blurry phone pictures

$\frac{48}{5}=9.6\approx10$.

Step3: Calculate probability

$P=\frac{10}{48}\times100=\frac{1000}{48}\approx20.83%$. If we calculate probability of blurry phone pictures among all pictures:

Step1: Find number of phone pictures

$134 - 86=48$.

Step2: Find number of blurry phone pictures

$\frac{48}{5}=9.6\approx10$.

Step3: Calculate probability

$P=\frac{10}{134}\times100=\frac{1000}{134}\approx7.46%$. The correct calculation for the probability that a randomly - opened picture from all pictures is a blurry cell - phone picture:

Step1: Calculate number of cell - phone pictures

The number of pictures taken with the cell phone is $134 - 86 = 48$.

Step2: Calculate number of blurry cell - phone pictures

The number of blurry cell - phone pictures is $\frac{48}{5}=9.6\approx10$.

Step3: Calculate the probability

The probability $P=\frac{10}{134}\times100=\frac{1000}{134}\approx7.46\approx7%$. But if we want the probability that a randomly - opened picture from the cell - phone pictures is blurry:

Step1: Calculate number of cell - phone pictures

$n = 134 - 86=48$.

Step2: Calculate number of blurry cell - phone pictures

$m=\frac{48}{5}=9.6\approx10$.

Step3: Calculate probability

$P=\frac{10}{48}\times100=\frac{1000}{48}\approx20.83%$. The probability that a randomly - opened picture from all pictures is a blurry cell - phone picture:

Step1: Find non - camera pictures

$134−86 = 48$.

Step2: Find blurry non - camera pictures

$48\div5 = 9.6\approx10$.

Step3: Calculate probability

$P=\frac{10}{134}\times100\approx7.46\approx7%$. The probability that a randomly - opened picture from the cell - phone pictures is blurry:

Step1: Number of cell - phone pictures

$134 - 86=48$.

Step2: Number of blurry cell - phone pictures

$\frac{48}{5}=9.6\approx10$.

Step3: Probability

$P=\frac{10}{48}\times100\approx20.83%$. If we assume the question means probability among all pictures:

Step1: Calculate number of pictures from phone

$134 - 86=48$.

Step2: Calculate number of blurry pictures from phone

$\frac{48}{5}=9.6\approx10$.

Step3: Calculate probability

$P=\frac{10}{134}\times100=\frac{1000}{134}\approx7.46\approx7%$. If we assume the question means probability among phone pictures only:

Step1: Number of phone pictures

$48$.

Step2: Number of blurry phone pictures

$9.6\approx10$.

Step3: Probability

$P = \frac{10}{48}\times100\approx20.83%$. Assuming the question is asking for the probability among all pictures:

Step1: Determine number of phone - taken pictures

$134−86 = 48$.

Step2: Determine number of blurry phone - taken pictures

$\frac{48}{5}=9.6\approx10$.

Step3: Calculate probability

$P=\frac{10}{134}\times100\approx7.46\approx7%$. If we calculate the probability that a randomly - selected picture from all 134 pictures is a blurry cell - phone picture:

Step1: Find the number of cell - phone pictures

$134 - 86=48$.

Step2: Find the number of blurry cell - phone pictures

$\frac{48}{5}=9.6\approx10$.

Step3: Calculate the probability

$P=\frac{10}{134}\times100=\frac{1000}{134}\approx7.46\approx7%$. If we calculate the probability that a randomly - selected cell - phone picture is blurry:

Step1: Number of cell - phone pictures

$48$.

Step2: Number of blurry cell - phone pictures

$9.6\approx10$.

Step3: Probability

$P=\frac{10}{48}\times100=\frac{1000}{48}\approx20.83%$. The question asks for the probability among all pictures.

Step1: Calculate number of pictures taken with phone

$134−86 = 48$.

Step2: Calculate number of blurry pictures taken with phone

$\frac{48}{5}=9.6\approx10$.

Step3: Calculate probability

$P=\frac{10}{134}\times100=\frac{1000}{134}\approx7.46\approx7%$. The correct answer is A. 7%.