A factory ships an order of 650 laptops. A worker test a random of 40 laptops and finds that 1 of the laptops takes more than 30 seconds to start up. Predict the number of laptops in the shipment that will take more than 30 seconds to start up.

Question

Mathematics

Gustavo Fletcher

22 February, 05:17

A factory ships an order of 650 laptops. A worker test a random of 40 laptops and finds that 1 of the laptops takes more than 30 seconds to start up. Predict the number of laptops in the shipment that will take more than 30 seconds to start up.

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Answers (1)

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Elisa Mendez · Answer 1

Answer: 16

Step-by-step explanation:

Total number of laptops ordered = 650

Number of laptops tested = 40

Number of laptops that takes more than 30 seconds to start up = 1

To get the number of laptops that will take 30 seconds to start in the whole shipment goes thus:

Let the number of laptops that will take more than 30 seconds be represented by y.

1 : 40 = y : 650

1/40 = y/650

Cross multiply

40y = 650

y = 650/40

y = 16.25 which approximately gives 16.

There are expected to be 26 laptops that takes more than 30 seconds to start.