In a frequency distribution having class intervals 0 – 10, 10 – 20, 20 – 30 and 30 – 40, the respective frequencies are x, x + 8, x – 2 and x – 4 and the arithmetic mean of the distribution is 17.8. The median lies in which one of the following class intervals ?
0 – 10
10 – 20
20 – 30
30 – 40
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