A letter to God class 10

While calculating mode the following observation are found. Lower limit of modal class =40, frequency of modal class =20, frequency of previous class =12 , frequency of preceding class =11 and width of the class =10, find mode .

A letter lock consists of three rings each marked with 10 different letters. In how many ways it is possible to make an unsuccessful attempt to open the lock?

First class lever and Second class lever

The width of each of five continuous classes in a frequency distribution is 5 and the lower class limit of the lowest class is 10. The upper class limit of the highest class is

If the upper and the lower limits of a class interval are 16 and 10, the class-interval is ...

How many 4 letter code can be formed using the first 10 letters of the english alphabet if no letter can be repeated.

10 different letters of an alphabet are given. Words with 5 letters are formed from these given letters then the numbers of words which have atleast one letter represent is:

In a frequency distribution, the mid values of a class is 10 and width of the class is 6 . The lower limit of the class is

In a frequency distribution, the mid-value of a class is 15 and the class intervals is 4. The lower limit of the class is 10 (b) 12 (c) 13 (d) 14

Find the actual lower class limits , upper class limits and mid values of the classes : 10 -19 , 20 - 29 , 30 - 39 , and 40 - 49