Student Doubts
hi team , i got 15 as the answer using alligation approach is that correct ?
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If the roots of the quadratic equation $$x^2 + kx + 4k = 0$$ are rational numbers, then what is the sum of all possible integral values of k such that -5<k<20?
k(k-16)>=0. then k<=0, I am little confused about the concept of sign change, is there a video link for the same , about when to change signs or directions of < , >
Ram had a basket of 4 different kinds of fruits, namely, apple, banana, mango and litchi, that were affected by pests of four differnt kinds A, B, C and D. Further:
1) There were not more than six fruits of the same kind that were affected by the same pest.
2) If there were two less mango, then there were twice as many bananas as any other kind of fruit.
3) In total, there were 42 fruits.
4) There were at least 4 mangoes that were affected by the pest C.
5) There was no apple that was affected by the pest A. If not for this exception, every kind of fruit had at least two fruits that was affected by each of the kinds of pests.
6) While different fruits of same kind can be affected by different pests, it is known that each individual fruit in any kind can be affected only by one pest.
7) The number of fruits that were affected by the pest A was half the number of fruits that were affected by each of the other three pests.
8) The number of fruits of each kind that were affected by each of the pests was an even number always.
Which of the following cases is not possible?
there is no video request button .................................................................................................................................................................................................
3 identical containers are completely filled with water-milk mixtures with water and milk in the ratio 2 : 3, 3 : 4 and 4 : 5 respectively. All these mixtures are poured into a bigger container. What fraction of the mixture in the bigger container should be replaced by water so that the resulting mixture has equal quantities of water and milk?
I'm stuck here , what will be the next step, to make the fraction --- 143/1088
By appyling the condition i.e import less than 560 and export less than 600
how germanys import will be 576 and export 480 instead of import -480 and export-576.
Ramu invests his money equally in two schemes, X and Y, offering compound interest. Scheme X provides an interest rate of 'a' for the first and the third year and offers an interest rate of 'b' for the second and the fourth year. Scheme Y offers an interest of 'c' for four years. If the total interest earned by Ramu is equal for both schemes, which of the following options best represents the relationship between 'a', 'b' and 'c'?
Sir, how (1+a)^2 (1+b)^2 = (1+c)^4 becomes, (1+a)(1+b)=(1+c)^2
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Why is option D incorrect 26+26=52, where as Day 4 = 28.8??????????????????????????????????????????????????????????
Roots of the quadratic equation $$px^2 + p^2(x + 1) - 4p = 0$$ are reciprocal to each other. How many values of $$p$$ are possible?
Correct Answer: 1
Can you pls explain why we are not considering the value of P as 0? I can understand the anything div by 0 logic makes us ignore the value but in the video sir is talking about P being the coefficient of x^2, that logic I don't understand, Can you pls explain that? Thanks
It should be mentioned in the question that SP is Rs 100/kg
as it was not mentioned,
i did not divide the TCP by sum of first n natural numbers and then proceeded.
Select from the options the appropriate summary for the given paragraph:
For more than six centuries, no other article had been allowed to be sold in the country of England as the sterling silver until and unless it has been thoroughly tested at the "Hall" in order to examine and determine that the silver's quality is up to the expected standard of the nine hundred & twenty-five parts of one thousand pure silver. Whereas, the remaining seventy-five parts of the alloy are usually allowed to be made of copper. This combination together brings the process of aging and fashioning, gives the silver a delicate blue "patina."
Please check the option A, para mentions upto the expected standard while option mentions more than the predetermined standard, rest 3 options are either incorrect or capture only one part while option A is a distortion.
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