61, 66, 70, 71, 76, ? , 81, 86, 70, 91

The following question, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series. 70,71, 76,___, 81, 86, 70, 91

73, 71, 67, 61, 59, ….

Find the arithmetic mean of the following numbers : 88, 72, 33, 29, 70, 54, 86, 91, 57, 61

The class marks of a distribution are 61,66,71,76,81,86,91,96,101,106. Determine the class size, class limits and true class limits.

The class marks of a distribution are 61,66,71,76,81,86,91,96,101,106. Determine the class size, class limits and true class limits.

41, 43, 47, 53, 61, 71, 73, 81 (a) 61 (b) 71 (c) 73 (d) 81

7, 28, 49, 70, 91, 112, ….

Pulse rate (per miute) of 30 persons were recorded as 61,76,72,73,71,66,78,73,68,81,78,63,72,75,80,68,75,62,71,81,73,60,79,72,73,74,71,64,76 and71. Construct a frequency table using class-invervals of equal width,one class interval being (60-65).

The following table gives the route length (in thousand kilometres) of the Indian Railways in some of the years: Year, 1960-61, 1970-71, 1980-81, 1990-91, 2000-2001 Route length (in thousand kilometres), 56, 60, 61, 74, 98 Represent the above data with the help of a bar graph.