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
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.
⇒ 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
Similar questions