Total height of 20 students of the class = 125 times; 20 = 2500 cm When 10 new students joined the class, average height of each student = 125 + 11 =136 cm Total height of 30 students of the class = 136 times; 30 = 4080 cm Average height of 6 new students who joined the class = {(4080; 2500)/10} = 1580/10 = 158 cm
Which of the following is polyatomic?
Which of the following gas is used to fill balloons.
Which statement about carbon credits is incorrect?
______ is defined as the number of moles of solute per litre of solution.
Identify the element that is NOT a metalloid.
Hydrogen exhibits properties similar to which groups in the periodic table?
Which alkali metal is represented by the atomic number 3?
Which substance is a colorless to faintyellow oily liquid with characteristics similar to tear gas?
How many periods are there in the Modern Periodic Table?
Which compound is commonly used in the production of heat-resistant bricks for fireplaces and furnaces?
