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04 Mar 2011, 11:10
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A
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Difficulty:
25%
(medium)
Question Stats:
78% (02:03) correct
22%
(02:39)
wrong
based on 821
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Barbata invests $2400 in the National Bank at 5%. How much additional money must she invest at 8% so that the total annual income will be equal to 6% of her entire investment?
A/ 1200
B/ 3000
C/ 1000
D/ 3600
E/ 2400
A/ 1200
B/ 3000
C/ 1000
D/ 3600
E/ 2400
04 Mar 2011, 20:07
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in short the question is asking wht additional amnt shud be added so tht the individual interest rates match up 6% of the total.
(x+2400)*6=2400*5+8x.
on solving, x=1200.
option A
(x+2400)*6=2400*5+8x.
on solving, x=1200.
option A
17 Mar 2019, 09:33
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This can be solved using alligation
5% 6% 8%
2 -----------1
2400 was invested at 5%. That is represented by 2 parts. 1 part was invested at 8%. 2400/2=1200
5% 6% 8%
2 -----------1
2400 was invested at 5%. That is represented by 2 parts. 1 part was invested at 8%. 2400/2=1200
