in a batch of 280 water purifiers,12 were found to be defective. what is the probability that a water purifier chosen at random
1 answer:
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Probability of choosing pink balloon is .
Step-by-step explanation:
Given,
Number of green balloons = 5
Number of yellow balloons = 3
Number of red balloons = 4
Number of pink balloons = 8
Total number of balloons = 5+3+4+8 = 20
To find the probability of pink balloon.
Formula
Probability of an even = number of outcomes ÷ total number of outcomes
So,
Probability of choosing pink balloon = =
So,
Simplified as mixed number equals to
(Keep in mind that the LCM was 8.)