A lot of laptop computers contain 20 good ones and 3 defective ones. If two are selected and tested, find the probability that at least one will be defective.

Step-by-step explanation:

Given : Number of good laptops =20

Number of defective ones=3

Total laptops =23

If 2 laptops were selected, then the probability that none of them was defective would be =

The probability that at least one will be defective= 1- P(none of them is defective)

Hence,  the probability that at least one will be defective.

maximum area = xy = (16)(32) = 512 ft2

to maximize the area of the garden, the side of the fence parallel to the side of the house should be 32 ft long, and the other two sides should both have length 16 ft.'

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