44. On buying a camera, the shopkeeper gives three rolls of film free. On buying a camera and six rolls of film, the shopkeeper gives additional four rolls of film free. If the equivalent discount is the same in both cases, then how many rolls will be equal in value to a camera?
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Answer:
) A, B, C and D are four friends each of whom weighs less than 100 kg. From among them they form a group and find the total weight of that group. If the sum of the total weights of all possible distinct groups, each having the same number of members as in the first is 882 kg, then the average weight of the four friends is
(1) 41.75 kg
(2) 63.5 kg
(3) 73.5 kg
(4) Cannot be determined
[OA: Option 3]
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Answer:
31 rolls will be equal in value to a camera?.
Step-by-step explanation:
Let the original price be Rs.100
First discount=10%
Discounted price =100–10%of 100=100–10=90
The second discount=15%
Discounted price after the second discount
=90–15%of 90=90–13.5=76,.5
Third discount=10%
Discounted price after the third discount
=76.5–10% of 76.5=76.5–7.65=68.85
Difference between the original price and discounted price =100–68.85=31.15
Equivalent discount in percentage=31.15*100/100=31.15%
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