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from given info we can write as
x+10 = 1/10 * ( 235)
solve for x = 13.5gms
which is 13.5/225 ; 6%
OPTION C

kawal27
When 10 grams of sugar is added to 225 grams of a brand of sweetened cornflakes, the resulting mixture is 10% sugar. What was the percentage of sugar in the 225 grams of cornflakes?



A)5.6%

B)5.7%

C)6%

D)6.4%

E)10%
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when 10 grams of sugar is mixed with 225 gram of cornflakes than the mixture becomes 235 grams.
the resulting mixture which is 235 grams is 10% sugar means 23.5
So, total sugar was 23.5 of which 10 grams we mixed, means cornflakes had 13.5 grams of sugar.
Now, check option (C) 225 of 6% = 13.5 (answer)


(C) - CORRECT
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we can use the weighted averages method here -

w1/w2= A2-A/A-A1

w1= 10
w2=225
A2 is the concentration of sugar in cornflakes ; let it be x %
A1 = 100 % since a mixture of sugar has 100% sugar

solving for x we get x= 6
(C)
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Let X be the sugar content in 225 grams of corn flakes

Solution: 10 grams of sugar + 225*x / 100 grams of sugar = 235*10 / 100 grams of sugar
10 + 2.25x = 23.5
2.25x = 13.5
X = 6

Answer is C
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