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What's new
1.
Partial Fractions
on 19.04.19
2.
Find roots of non-linear equations using Multivariate Newton Raphson method
on 19.04.19
3.
Solve linear equations using Elimination method
on 19.04.19
4.
Maximize Profit case in transportation problem
on 07.04.19
5.
Revised Simplex method
on 26.03.19
6.
Moore-Penrose Pseudoinverse
on 22.03.19
7.
Geometric mean, Harmonic mean for ungrouped data
on 21.03.19
8.
Geometric mean, Harmonic mean for grouped data
on 21.03.19
9.
LQ Decomposition
on 20.03.19
10.
Muller method
on 20.03.19
11.
Matrix Algebra
on 17.03.19
1.
with variables
`[[2x,3y],[3x,4z]]`
2.
with complex numbers
`[[-5i,3i],[4i,5i]]`
3.
with surds
`[[1/sqrt(2),sqrt(2)],[4,-5]]`
12. PERT and CPM
1.
Network diagram
on 10.03.19
2.
Critical path, Total float, Free float, Independent float
on 10.03.19
3.
Project scheduling with uncertain activity times (Optimistic, Most likely, Pessimistic)
on 10.03.19
4.
Project crashing to solve Time-Cost Trade-Off with fixed Indirect cost
on 10.03.19
5.
Project crashing to solve Time-Cost Trade-Off with varying Indirect cost
on 10.03.19
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Method and examples
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 9 of 12
9. A reduction of
% in the price of basmati rice would enable a man to buy
kg of rice more for Rs
. Find the reduced price per kg.
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Percentage
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 price per kg.
A reduction of `20` % in the price of basmati rice would enable a man to buy `2` kg of rice more for Rs `250` .
`:.` Reduced price of `2` kg rice = `20` % of Rs `250 = 20 / 100 × 250 = 50`
`:.` Reduced price of `2` kg rice = Rs `50`
`:.` Reduced price of per kg rice = Rs `25`
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