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20:11::102:?

A beaker contains acid ajd water in the ratio of 1:x .when 300 ml of the mixture and 50 ml of water are mixed,the ratio of acid and water becomes 2:5 .what is the value if x?

20 balls are distributed among 5 children. In how many ways can this be done if the children get only an even number of balls with each one having atleast one ball ?
(1) 126
(2) 975
(3)1001
(4) None of these

89250_17850_7140_1428_?_144.24

which gas help ripening of fruit naturally ?..
Ethylene I right

A fruit vendor buys a dozen apples at rs 108. At what price should he sell a dozen so that he makes a profit of 16.67% after allowing 14.28% for decay

in a school there are five classes (class 1 to V) each class has two sections A nd B . Each section is accommodated in a different flassroom.The rooms are in a row.
1)The two sections A and B of any class are no adjacent
2)Any four consecutive classrooms, accommodate two A sections and two B sections.
3)Class V A is three places away from class I A and neither of these two is at any of extreme ends
4)Class III B is three places away from Class IV B and neither is at any extreme end
5)Class II B is not any extreme end
6)Class II A is at extreme right
7)Class V A is right of Class III B
Q Which class is at extreme left
A) I
B )V
C)III
D)cannot be determined
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Find the value of 6+11+16+21+26+....+71

in an examination 38% fail in English and 61% pass in hindi and 23% fail in both .find the actual fail percentage, assuming a student passes only if he clears both these subjects.

Amount of income is kept on goods, 4% of 2780 is spent on 75% of stock and 5% on 80%, 5% is spent in stocks.
1. 1500
2. 1280
3. 1600
4. 3000
5. None of these