The arithmetic mean of 100 observations is 40. Later, it was found that an observation ‘53’ was wrongly read as ‘83’. What is the correct arithmetic mean ?
39·8
39·7
39·6
39·5
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy