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One test tube contains some chemical and another test tube contains an equal quantity of water. To prepare a solution, 20 g of the chemical is poured into the second test tube. Then, two-thirds of the formed solution is poured from the second test tube into the first. If the fluid in the first test tube is four times that in second, what quantity of water was taken initially.
In an archery contest, 65% of the total participants hit the target in the first test itself and 55% of the total participants hit the target in the second test. 20% of the total participants do not hit the target in any test. What percentage of participants hit the target in both tests?
Statements: Some target are chasable. All chasable are possible. Some possible are win. Conclusion: I. No target are win. II. Some win are target. III. Some possible are target.
Archers 'A' and 'B' take aim at a target. if the probability of 'A' hitting the target is 90% and of 'B' missing the target is 90% what is the probablity that both 'A' and 'B' miss the target?
The odds favouring the event of a person hitting a target are 3 to 5. The odds against the event of another person hitting the target are 3 to 2. If each of them fire once at the target, find the probability that both of them hit the target.
Dev can hit a target 3 times in 6 shots pawan can hit the target 2 times in 6 shots and Lakhan can hit the target 4 times in 4 shots. What is the probability that at least 2 shots hit the target -
Match the following  (a) a non-metal that exists in two forms (i) Chlorine (b) a non-metal which is liquid at room temperature   (ii) Zinc (c) a metal which is constituent of brass and bronze (iii) Carbon (d) a non-metal used for disinfecting water (iv) Bromine (e) a metal used in electroplating (v) Copper
A cylindrical tube open at both ends is made of metal. The internal diameter of tube is 11.2 cm and its length is 21 cm. The metal everywhere is 0.4 cm thick. The volume of the metal \(\left( {Take\;\pi = \frac{{22}}{7}} \right)\) is
A cylindrical tube open at both ends is made of metal. The internal diameter of the tube is 11.2 cm and its length is 21 cm. The metal everywhere is 0.4 cm thick. The volume of the metal is :
Metal 'A' displaces metal 'B' from its salt solution, but not able to displace metal 'C' from its salt solution. Metal 'B' displaces metal 'D' from its salt solution. Which of the following depicts correct order of reactivity of metals.