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 By: Strawberry (offline)  Thursday, August 16 2012 @ 09:40 AM CDT (Read 1092 times)
Strawberry

15. There were 192 apples and pears in a box. John removed 2/5 of the apples from the box and he added 24 pears into the box. As a result, there was an equal number of apples and pears left in the box. How many more apples than pears were there in the box at first?

16.65% of the animals on a farm were cows and the rest were goats. When 240 more cows and goats were added to the farm, the percentage of cows increased by 20% and the number of goats doubled. How many goats were there on the farm at first?

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Registered: 01/31/09
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 By: awyw1201 (offline)  Friday, August 17 2012 @ 10:25 AM CDT
awyw1201

Q15

Apples at 1st---> 5u

Suppose we add 24 pears and none of the apples were removed, then ratio of A---> 5:3

Thus, 8u---> 192 + 24 = 216

1u---> 27

No. of pears at 1st ---> 27 x 3 - 24 = 57

No. of apples at 1st ---> 192 - 57 = 135

Diff ---> 135 - 57 = 78

Ans : 78

Q16

Ratio of C:G---> 65u: 35u

When 240 cows and goats were added,

% of cows increased by 20%---> 65u x 120% = 78u

goats doubles ---> 35u x 2 = 70u

Thus, (78u + 70u) - 100u = 48u ---> 240

35u---> 240/48 x 35 = 175

Ans: 175

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Posts: 87

 By: Strawberry (offline)  Friday, August 17 2012 @ 12:09 PM CDT
Strawberry

Thanks ... need more clarification on 16. how did you get 78u

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Posts: 83

 By: Strawberry (offline)  Friday, August 17 2012 @ 12:11 PM CDT
Strawberry

ok... i found it ... using 20% of 65 will get 13.. so 65 + 13

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