Mathematics
Grade10
Easy

Question

Find the mean and median of the following data.
10, 10, 20, 40, 70, 80

  1. 40, 20              
  2. 30, 20             
  3. 40, 30                    
  4. 40, 40

hintHint:

Mean is the most commonly used measure of central tendency. It actually represents the average of the given collection of data. It is applicable for both continuous and discrete data.Generally median represents the mid-value of the given set of data when arranged in a particular order.

The correct answer is: 40, 30


    Mean  =     fraction numerator s u m space o f space o b s e r v a t i o n over denominator n u m b e r space o f space o b s e r v a t i o n s end fraction
    equals fraction numerator 10 plus 10 plus 20 plus 40 plus 70 plus 80 over denominator 6 end fraction
equals 240 over 6  
    =  40
    Median:
    n over 2th and n over 2+ 1th observations mean
    3rd and 4th
    text  Median  end text equals fraction numerator 20 plus 40 over denominator 2 end fraction equals 60 over 2 equals 30
    Hence,the correct option is (c).

    The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set. The median is the middle value when a data set is ordered from least to greatest.

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