The average marks of 3 paper is 6, the average
marks of last two paper is 55, the average marks of last three
paper is 70, find average marks of 2nd paper.
Answers
Step-by-step explanation:
• The information collected in the form of numbers is called Data.
• Data is organised and represented graphically so that it becomes
easy to understand and interpret.
• The difference between the highest and lowest observations in a
given data is called its Range.
• The average or Arithmetic Mean or mean of a given data is
defined as :
Mean =
Sum of all observations
Number of observations
• Mode is the observation that occurs most frequently in the data.
• If each of the values in a data are occurring one time (or equal number
of times), then all are mode. Sometimes, we also say that this data
has no mode since none of them is occurring frequently.
• When the given data is arranged in ascending (or descending) order,
then the middle most observation is the median of the data.
• Mean, median and mode are the representative values of a group of
observations. They are also called the measures of central tendency
of the data.
• The representation of the data in the form of rectangles (bars) of
uniform width is called a Bar Graph.
• A double bar graph can be used to compare informations related to
two data.
• The situation that may or may not happen, have a chance of
happening.