Erica uses 9 gallons of gas to drive 198 miles. How many miles can he drive using 1 gallon of gas?
1 answer:
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<u>Answer:</u>
• mean = 61
• mode = 50
• median = 57.5
<u>Step-by-step explanation:</u>
• The mean is calculated by adding all the values together, and dividing the result by the number of values.
∴ mean =
⇒ mean =
⇒ mean = 61
• The mode of a set of values is the value that is the most common (has highest frequency) among them.
50 is the most common value.
∴ mode = 50
• The median is the middle-value of a set of ordered values.
∴ We have to first rearrange the set:
⇒ 40, 50, 50, 50, 55, 60, 65, 70, 80, 90
Now we need to find the middlemost value:
Since we have 10 values, which is an even number, we have to use the formula:
median =
where n is the number of values.
∴ median =
⇒ median =
The 5th and 6th terms in our ordered series are 55 and 60 respectively.
∴ median =
⇒ median = 57.5