Lena invested her savings in two investment funds. The $6000 that she invested in Fund A returned a 6% profit. The amount that she invested in Fund B returned a 1% profit. How much did she invest in Fund B, if both funds together returned a 4% profit?

The amount that Lena will invest in fund B would be $4000.

Explanation:

Given information -

Amount invested in fund A - $6000

Return earned on fund A - 6%

Let us assume amount invested in fund B be x

Return earned on fund B - 1%

Return on both funds together - 4%

Let us assume the total amount of fund invested be ($6000 + x)

Now using simple equation, we will take out the value of x which is the amount invested in fund B -

$6000 X 6% + x X 1% = 4% ($6000 + x)

= $360 +.01 x = $240 +.04 x

= $360 - $240 =.04 x -.01 x

$120 =.03 x

x = $120 /.03

= $4000.