MATHEMATICS HIGH SCHOOL

. The mean width of 12 iPads is 5.1 inches. The mean width of 8 Kindles is 4.8 inches. a. What is the total width of the iPads? b. What is the total width of the Kindles? c. What is the mean width of the 12 iPads and 8 Kindles?

Answers

Answer 1

Answer:

Answer:

a) 61.2, b) 38.4 and c) 4.98

Step-by-step explanation:

Given:

The mean width of 12 I-Pads is 5.1 inches.

The mean width of 8 Kindles is 4.8 inches.

Question asked:

a. What is the total width of the I-Pads?

b. What is the total width of the Kindles?

c. What is the mean width of the 12 I-Pads and 8 Kindles?

Solution:

As we know:

$Mean =(Sum\ of\ observations)/(Number\ of\ observations)\n \n Mean\ width =(Sum\ of\ width\ of\ all \ I-pad)/(Number \ of\ I-pad)$

$5.1=(Sum\ of\ width\ of\ all\ I-pad)/(12) \n \n By \ cross\ multiplication\n \n Sum\ of\ width\ of\ all\ I-pad}=5.1*1 2\n \n Sum\ of\ width\ of\ all\ I-pad}= 61.2$

a) Thus, the total width of the I-Pads are 61.2 inches.

$Mean\ width =(Sum\ of\ width\ of\ all\ Kindles)/(Number \ of\ Kindles)$

$4.8=(Sum\ of\ width\ of\ all\Kindles)/(8) \n \n By \ cross\ multiplication\n \n Sum\ of\ width\ of\ all \ Kindles=4.8*8\n \n Sum\ of\ width\ of \ all\ Kindles}=38.4$

b) Thus, total width of the Kindles are 38.4 inches.

Combined width of both I-pad and Kindles = 61.2 + 38.4 = 99.6 inches

Combined number of observations = 12 + 8 =20

Combined mean of width of the 12 I-Pads and 8 Kindles = Combined width of both I-pad and Kindles $/$ Combined number of observations

Combined mean of width of the 12 I-Pads and 8 Kindles = $(99.6)/(20) =4.98\ inches$

c) Thus, the mean width of the 12 I-Pads and 8 Kindles is 4.98 inches.

Answer 2

Answer:

Final answer:

The total width of the iPads is 61.2 inches and for the Kindles, 38.4 inches. When calculated together, the mean width of the iPads and Kindles is 4.98 inches per device.

Explanation:

This question deals with the calculation of means (averages) and total values. To find the total width of the iPads, we multiply the mean width by the number of iPads:

5.1 inches * 12 iPads = 61.2 inches.

For the Kindles, we do the same:

4.8 inches * 8 Kindles = 38.4 inches.

To find the mean width of all the devices together, we add up the total widths and divide by the total number of devices:

(61.2 inches + 38.4 inches) / (12 iPads + 8 Kindles) = 99.6 inches / 20 devices = 4.98 inches/device.

Learn more about Mean Calculation here:

brainly.com/question/30756017

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