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svlad2 [7]
3 years ago
14

In a batch of 280 water purifiers, 12 were found to be defective. What is the probability that a water purifier chosen at random

will be defective? Write the probability as a percent. Round to the nearest tenth of a percent if necessary
Mathematics
2 answers:
aleksley [76]3 years ago
6 0
This is experimental probability.

If 12 were found to be defective out of 280 the experimental probability of a purifier being defective is:

12/280 which is:

4.3%  (to nearest tenth of a percent)
Gnom [1K]3 years ago
3 0

Answer:

 \text{Probability}=4.3\%

Step-by-step explanation:

Given : In a batch of 280 water purifiers, 12 were found to be defective.

To find : What is the probability that a water purifier chosen at random will be defective?  Write the probability as a percent.

Solution :

Total number of batch of purifiers = 280

Number of defective purifiers = 12

The probability that a water purifier chosen at random will be defective is given by,

\text{Probability}=\frac{\text{Favorable outcome}}{\text{Total outcome}}

 \text{Probability}=\frac{12}{280}

 \text{Probability}=\frac{3}{70}

Converting into percentage,

 \text{Probability}=\frac{3}{70}\times 100

 \text{Probability}=4.28\%

Round to nearest tenths,

 \text{Probability}=4.3\%

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