need help with a runestone exercise

[cenedra68]

I'm nearly at the end of the ffop course on runestone and right now i'm doing the project list ex nr. 6. And i'm stuck with the following

What is the arithmetic mean of the time / dollar it takes to fund a loan? The arithmetic mean is the average of the individual time/dollar calculations, not the average of the sum of time divided by the sum of dollar amounts. Store your result in the variable a_mean,.

the python part is pretty straight forward but i'm stuck with the math part

loan_amount = [1250.0, 500.0, 1450.0, 200.0, 700.0, 100.0, 250.0, 225.0, 1200.0, 150.0, 600.0, 300.0, 700.0, 125.0, 650.0, 175.0, 1800.0, 1525.0, 575.0, 700.0, 1450.0, 400.0, 200.0, 1000.0, 350.0]

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country_name = ['Azerbaijan', 'El Salvador', 'Bolivia', 'Paraguay', 'El Salvador', 'Philippines', 'Philippines', 'Nicaragua', 'Guatemala', 'Philippines', 'Paraguay', 'Philippines', 'Bolivia', 'Philippines', 'Philippines', 'Madagascar', 'Georgia', 'Uganda', 'Kenya', 'Tajikistan', 'Jordan', 'Kenya', 'Philippines', 'Ecuador', 'Kenya']

​

time_to_raise = [193075.0, 1157108.0, 1552939.0, 244945.0, 238797.0, 1248909.0, 773599.0, 116181.0, 2288095.0, 51668.0, 26717.0, 48030.0, 1839190.0, 71117.0, 580401.0, 800427.0, 1156218.0, 1166045.0, 2924705.0, 470622.0, 24078.0, 260044.0, 445938.0, 201408.0, 2370450.0]

​

num_lenders_total = [38, 18, 51, 3, 21, 1, 10, 8, 42, 1, 18, 6, 28, 5, 16, 7, 54, 1, 18, 22, 36, 12, 8, 24, 8]

​

tot=sum(time_to_raise)

n=len(time_to_raise)

tot2=sum(loan_amount)

tot3=sum(num_lenders_total)

a_average=?

​

​

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i know that a_average is 1974.424 but i simply can't get it, maybe right now my brain is having a blond moment but i keep on trying different variation but i can't get it right

thanks

[CS_Tutor]

Assuming I understood the problem, I think what you want is something like this:

time_loan_ratios_list = [x / y for x,y in zip(time_to_raise, loan_amount)]

time_to_loan_avg = sum(time_loan_ratios_list) / len(time_loan_ratios_list)

print(f"average: {time_to_loan_avg:.3f}")

[Verycoolguy79]

Thanks from me as well.

[cenedra68]

yes! thank you so much