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Gambusia can be used for the biological control of mosquitoes. Gambusia is a fish species that feeds on larvae of mosquitoes. Oil can also be used to prevent the breeding of mosquitoes on stagnant water by creating an oil slick on water. Ointments are used by humans which provide protection from mosquito bites. Dichlorodiphenyltrichloroethane (DDT) is an insecticide which can also be used to control (Not biologically) mosquitoes.
What is the average of the squares of the first 35 natural numbers?
The average salary of 12 employees in a company is Rs.45,000 per year. When two new employees, Alice and Bob, join the company, their salaries being in ...
A candidate just passed by getting 60 answers correct by attempting 132 of the total questions. Find the total number of questions in the examination if...
In a Math exam, the average score of 50 students is 68. The ratio of boys to girls in the class is 3:2. If the average score of the boys is 70, what is ...
The average age of a class of 20 girls is 16 years. If 4 new girls having average age of 10 years join the class, then the average age of the class beco...
The average number of books sold by Viren in first 5 months is 3500 and in first 6 months is 4300. If the number of books sold by him in 7th ...
The average of 8 numbers is 12. If the 2 is added in 1st number, 4 is added in 2nd number, 8 is added in 3rd number and in the same way the number are a...
A number is such that when it is multiplied by 3, it gives another number which is as much above from 240 as the original number (itself) is below 240. ...
The average age of A and B is 17 years. If A is to be replaced by C, the average would be 16 years. The average age of C and A is 18 years. Find the age...
In an examination, a student has an average score of 84. If he had scored 14 more marks in Science and 19 more marks in English, his average would incre...
