the mean height of 10 student is 151.8 cm . two more student of height 157.6 cm and 154.4 cm join the group . what is the new mean height
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Answered by
153
Mean = sum of all observations /Total no: of observations.
Sum of all observations = Mean × Total no: of observations.
= 151.8 cm × 10 = 1518 cm
157.6 cm and 154.4 cm are the new heights .So to find the new mean, these two heights must be added and the total no: of students thus is equal to 12 students.(as 2 students were added)
New sum of observations = 1518 cm + 157.6 cm + 154.4
= 1830 cm
New mean = sum of all observations /Total no: of observations.
= 1830 cm ÷ 12 = 152.5 cm
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Sum of all observations = Mean × Total no: of observations.
= 151.8 cm × 10 = 1518 cm
157.6 cm and 154.4 cm are the new heights .So to find the new mean, these two heights must be added and the total no: of students thus is equal to 12 students.(as 2 students were added)
New sum of observations = 1518 cm + 157.6 cm + 154.4
= 1830 cm
New mean = sum of all observations /Total no: of observations.
= 1830 cm ÷ 12 = 152.5 cm
Please mark brainliest ...
Answered by
40
hey mate your answer is 152.5 is the new mean height.
you have got the steps in first answer so I am not writing the steps.
hope you have understood.
if not tell me I will explain.
please don't forget to mark me the brainliest
thank yoiu
you have got the steps in first answer so I am not writing the steps.
hope you have understood.
if not tell me I will explain.
please don't forget to mark me the brainliest
thank yoiu
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