Mortage hypo loan

The Jonáš family decided to buy an older apartment, which cost EUR 30,000. They found EUR 17,000 and took a bank loan for the remaining amount. What interest did they receive if they repaid this amount for 15 years at EUR 120 per month?

Final Answer:

p =  7.4307 %

Step-by-step explanation:

a=3000017000=13000 eur n=15 12=180 s=120 eur  b=n s=180 120=21600 Eur   s = a     qn1 qn   (q1)  120 = 13000     q1801 q180   (q1) q>0 q=1.00619222430451.0062 p1=q1=1.006210.0062 p2=12 p1=12 0.00620.0743  p=100 p2=100 0.0743=7.4307%



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