Math, asked by aabitha, 1 year ago

the mark of 7 students are 55 the marks of 6 students are 52,54,55,53,56,54
find the mark of the seventh student

Answers

Answered by Anonymous
7
x̅ = 1 / n (Σxi)  ⇒ 55 = x1 + x2 + .......+    ⇒ x7 / 7

  ⇒  x1 + x2 + ...... + x7 = 55 × 7 = 385

 x1 + x2 + ...... + x6 = 52 + 54 + 55 + 53 + 56 + 54 = 324 

∴ x7 = 385 - 324 = 61 kg 

∴ weight of the seventh student is 61 kg. 


bhavanishankar1: hi
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