Economy, asked by maka1107, 9 months ago

marks obtained by a student in 6 subjects are 84, 91, 72, 68, 87 and 78. find the arithmetic mean using short cut method

Answers

Answered by lakshmiprasanna49

11

Answer:

average=sum of all observations/no.of observations

average=84+91+72+68+87+78

480/6

80 is average

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