Question

Good Morning Brainliacs!!

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The average height of 5 students is 1.45 m. If one student left the group, the average height of the remaining four of them is 1.44 m. What was the height of the student who left?


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I take a pledge that I will definitely mark the best answer as the brainliest.

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Answer 1

$\huge\mathfrak\pink{Good\:Morning}$

Average number = sum of observation / No of observation

So,

1.45 = sum / 5

Sum of all heights = 7.25

If one of them is removed then average is = 1.44

So,

1.44 = sum / 5

Sum of 4 heights = 5.76

Clearly,
Height of student who left = Sum of all height - sum of 4 students height

= 7.25 - 5.76

= 1.49

Answer 2

Answer:

Average height of 5 people= 1.45

Average = Sum of the observation ÷ No. of observations

Average of the five people=

x (Sum of the heights) ÷ 5

Sum of the heights= 1.45×5

=7.25

1 person left

Average of the height of the remaining people= 1.44

Sum of the heights now= 1.44×4=

5.76

Thus, the person who left has a height of

7.25-5.76= 1.49

Thank you