exam
Maths Puzzle
Numerical Ability
Two fair dice are rolled. Find the probability that the sum of the two numbers is not greater than 5.
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please explain.
-4(2x-3)=8x+5
Let x=rate invested at 5%.
Then the rate invested at 2% is 25,000-x
You have: 0.05x+0.02(25,000-x)=980
0.05x+500-0.02x=980
0.03x+500=980
0.03x=480
x=16000
$16,000 was invested at 5% and 9,000 at 2%.