Question

In a box of 25 switches, 3 are defective. what is the probability of randomly selecting a switch that is not defective? enter your answer as a percentage; example: 33%

Answer 1

not defective : 25 - 3 = 22
probability of not defective : 22/25

22/25 × 100% = 88%

Answer 2

The probability of randomly selecting a switch that is not defective is 88%

How to determine the probability?

The given parameters are:

• Number of switch = 25
• Number of defective switch = 3

The number of switch that are not defective is calculated using:

Not defective = 25 - 3

Evaluate

Not defective = 22

The probability is then calculated as:

P(Not defective) = 22/25

Express as percentage

P(Not defective) = 88%

Hence,  the probability of randomly selecting a switch that is not defective is 88%

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