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Here's the slow (calculations-heavy solution):nataras wrote:During the first 11 months of a recent year, a certain charitable organization received an average (arithmetic mean) of $20,600 per month in donations. How much did the organization receive in donations during December of that year if the average amount of donations per month for the entire year was $21,000?
a) 21,400
b) 21,600
c) 24,000
d) 25,400
e) 25,800
Here's the faster approach:nataras wrote:During the first 11 months of a recent year, a certain charitable organization received an average (arithmetic mean) of $20,600 per month in donations. How much did the organization receive in donations during December of that year if the average amount of donations per month for the entire year was $21,000?
a) 21,400
b) 21,600
c) 24,000
d) 25,400
e) 25,800
Total Donation in 11 Months = 11 x $20,600 = $2,26,600nataras wrote:During the first 11 months of a recent year, a certain charitable organization received an average (arithmetic mean) of $20,600 per month in donations. How much did the organization receive in donations during December of that year if the average amount of donations per month for the entire year was $21,000?
a) 21,400
b) 21,600
c) 24,000
d) 25,400
e) 25,800
OA: D
ALTERNATIVE SOLUTION:nataras wrote:During the first 11 months of a recent year, a certain charitable organization received an average (arithmetic mean) of $20,600 per month in donations. How much did the organization receive in donations during December of that year if the average amount of donations per month for the entire year was $21,000?
a) 21,400
b) 21,600
c) 24,000
d) 25,400
e) 25,800
OA: D
To make the math easier, use the following values:nataras wrote:During the first 11 months of a recent year, a certain charitable organization received an average (arithmetic mean) of $20,600 per month in donations. How much did the organization receive in donations during December of that year if the average amount of donations per month for the entire year was $21,000?
a) 21,400
b) 21,600
c) 24,000
d) 25,400
e) 25,800
OA: D
Here, we get the following number line:During the first 11 months of a recent year, a certain charitable organization received an average (arithmetic mean) of $200 per month in donations. How much did the organization receive in donations during December of that year if the average amount of donations per month for the entire year was $300?
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