The beauty of Mathematics (two) the way of credit card profit

I'm probably 2008. It started with a credit card, one with 7-8 years, before there was no doubt resolved. User agrees, credit card overdraft, monthly cycle allows users to overdraft, how do they make money? I'm 7-81 cents! In fact, we're going to use the formula to derive some of the words. Data tells you how a credit card can make a profit from a user. Let's do something first if:

If user A in the current month credit card 1000 yuan consumption, he is unable to pay the full amount of money, he needs to use the minimum repayment, the period of 2 months according to the minimum amount of 10% calculation, the 3rd month all pay off, the interest of 5 per thousand per day. Calculate the profitability of the bank.

give a list of the sheets. Look at player A's spending situation :

watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvbgl1amlhbje5nzkwnte4nzuxmq==/font/5a6l5l2t/fontsize/400/fill/ I0jbqkfcma==/dissolve/70/gravity/center "/>

User A has contributed 285 interest to the bank for 2 months.

If we calculate by 10 million credit card users, if 5% of the users have this situation, in 1 years 12 months will be: 1000*0.05*285*6 has about 800 million more income.

Here's a good explanation. Seemingly free credit cards, the bank of the big boys to spend a great effort to promote the reasons.

Copyright notice: This article Bo Master original articles, blogs, without consent may not be reproduced.

The beauty of Mathematics (two) the way of credit card profit