g A survey asked households whether they have a cell phone, a personal computer, or a television. If 40 had a cell phone 60 had a personal computer 50 had a television 25 had a cell phone and a personal computer 30 had a personal computer and a television 35 had a cell phone and a television 10 had all three how many households had at least one of the three devices

A survey is a research method used for collecting data and then analyse.

The number of households that had at least one of the three devices is 70.

According to question,

Since, 40 had a cell phone,

60 had a personal computer

50 had a television

25 had a cell phone and a personal computer n (C ∩ PC) = 25

30 had a personal computer and a television ,n(PC ∩ T) = 30

35 had a cell phone and a television , n (C ∩ T) = 35

10 had all three ,n (C ∩ PC ∩ T) = 10

We know that,

Therefore,  70 households that had at least one of the three devices.

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The number of households that had at least one of the three devices is 70.

Step-by-step explanation:

The data provided is as follows:

n (C) = 40

n (PC) = 60

n (T) = 50

n (C ∩ PC) = 25

n (PC ∩ T) = 30

n (C ∩ T) = 35

n (C ∩ PC ∩ T) = 10

Compute the number of households that had at least one of the three devices as follows:

Thus, the number of households that had at least one of the three devices is 70.

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step-by-step explanation:

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m