要用英文回答.stan bought donuts for a drama club meeting he bought 6 regular donuts for 45 cents each and 9 premium donuts for 45 cents each and 9 premium donuts for 55 cents each how much did he spend what was the mean price per donut?
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![要用英文回答.stan bought donuts for a drama club meeting he bought 6 regular donuts for 45 cents each and 9 premium donuts for 45 cents each and 9 premium donuts for 55 cents each how much did he spend what was the mean price per donut?](/uploads/image/z/13899628-28-8.jpg?t=%E8%A6%81%E7%94%A8%E8%8B%B1%E6%96%87%E5%9B%9E%E7%AD%94.stan+bought+donuts+for+a+drama+club+meeting+he+bought+6+regular+donuts+for+45+cents+each+and+9+premium+donuts+for+45+cents+each+and+9+premium+donuts+for+55+cents+each+how+much+did+he+spend+what+was+the+mean+price+per+donut%3F)
要用英文回答.stan bought donuts for a drama club meeting he bought 6 regular donuts for 45 cents each and 9 premium donuts for 45 cents each and 9 premium donuts for 55 cents each how much did he spend what was the mean price per donut?
要用英文回答.
stan bought donuts for a drama club meeting he bought 6 regular donuts for 45 cents each and 9 premium donuts for 45 cents each and 9 premium donuts for 55 cents each how much did he spend what was the mean price per donut?
要用英文回答.stan bought donuts for a drama club meeting he bought 6 regular donuts for 45 cents each and 9 premium donuts for 45 cents each and 9 premium donuts for 55 cents each how much did he spend what was the mean price per donut?
For 6 regular donuts,he spent:
6 * $0.45 = $2.70;
For 9 premium donuts,he spent:
9 * $0.55 = $4.95;
Total is:
$2.70 + $4.95 = $7.65
mean price is:51 cents per donut.
$7.65/(6+9) = $0.51
What is the question
6 regular donuts for 45 cents each is two dollars seventy cents
9 premium donuts for 45 cents each is four dollars and five cents
9 premium donuts for 55 cents is four dollars ninety five cents
Total: $11.70 for two dozen donuts
About forty nine cents for each donut.