If a variable takes values 0, 1, 2, 3, ..., n with frequencies 1, C(n, 1), C(n, 2), C(n, 3), ..., C(n, n) respectively, then the arithmetic mean is
2n
n + 1
n
n/2
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