數學(代數)
2006-11-13 12:57 am
Tom invested 100 000 in funds and shares. A year later,the returns fo funds and shares were 15%and25%respectively. If the total profit was 19 000, how much did Tom invest in funds?
回答 (2)
2006-11-13 1:10 am
Let $M be the amount of money Tom invest in funds, them the amount of money Tom invest in shares is $(100000-M)
0.15M+0.25(100000-M)=19000
0.15M+25000-0.25M=19000
0.1M=6000
M=6000/0.1
M=60000
So, the amount of money Tom invest in funds is $60000
0.15M+0.25(100000-M)=19000
0.15M+25000-0.25M=19000
0.1M=6000
M=6000/0.1
M=60000
So, the amount of money Tom invest in funds is $60000
2006-11-13 1:04 am
Let x be the amount he invested in funds, then the amount he invested in shares is 100 000 - x
x*15% + (100 000 - x)*25% = 19 000
0.15x + 25 000 - 0.25x = 19000
25 000 - 0.1x = 19000
0.1x = 6 000
x = 60 000
He invested $60 000 in funds.
x*15% + (100 000 - x)*25% = 19 000
0.15x + 25 000 - 0.25x = 19000
25 000 - 0.1x = 19000
0.1x = 6 000
x = 60 000
He invested $60 000 in funds.
參考: Myself
收錄日期: 2021-04-20 20:10:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061112000051KK03593