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LQ Decomposition
on 20.03.19
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Muller method
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Matrix Algebra
on 17.03.19
1.
with variables
`[[2x,3y],[3x,4z]]`
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with complex numbers
`[[-5i,3i],[4i,5i]]`
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with surds
`[[1/sqrt(2),sqrt(2)],[4,-5]]`
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Network diagram
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Critical path, Total float, Free float, Independent float
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Project scheduling with uncertain activity times (Optimistic, Most likely, Pessimistic)
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Percentage
1. What is 20 % of 80 .
2. 42 is 3 % of what.
3. What percent of 65 is 130 .
4. 130 is what percent of 65 .
5. What is the percentage increase/decrease from 20 to 40 ?
6. A's annual income is increased/decreased from Rs 60000 to Rs 75000 . Find the percentage of increase in A's income.
7. In a school of 225 boys, 15 were absent then what percent were present ?
8. A earns 25 % more than B. By what percent does B earn less then A.
9. A reduction of 20 % in the price of basmati rice would enable a man to buy 2 kg of rice more for Rs 250 . Find the reduced pr ...
10. The price of tea has gone up by 20 %. By how much percent should its consumption be reduced so as not to increase the expendi ...
11. Find the selling price of an item, of which the printed price is Rs 25000 if the successive discounts given are 10 %, 8 % and ...
12. The successive discount of 10 % and 5 % are given on the purchased Computer. If the final price of the Computer is Rs 10260 , ...
Problem 12 of 12
12. The successive discount of
% and
% are given on the purchased Computer. If the final price of the Computer is Rs
, then find the printed price of the Computer.
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Percentage
12. The successive discount of 10 % and 5 % are given on the purchased Computer. If the final price of the Computer is Rs 10260 , then find the printed price of the Computer.
Let the printed price of computer be Rs `X`
The amount paid by customer = `90` % of `95` % of `X`
`:.` amount after both the discounts `= X × 90 / 100 × 95 / 100`
`:. 10260 = X × 90 / 100 × 95 / 100`
`:. X = (10260 × 100 × 100 ) / (90 × 95) = 12000`
Hence printed price of the computer is Rs `12000`.
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