average height of 10 students In a class is 150 cm. a boy of height 160 cm left the class and a boy of height 148 cm is admitted. then what is the average height of the students in the class now ?
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1500 is total sum of height
if one boy of 160 left
then,total height is 1340
then again if one of 148 is admitted total height is 1448
therefore average of height is 1448/10=144.8cm
if one boy of 160 left
then,total height is 1340
then again if one of 148 is admitted total height is 1448
therefore average of height is 1448/10=144.8cm
Answered by
0
Answer:
148.8 cm
Step-by-step explanation:
Given
Average height of 10 student = 150 cm
Sum of the height of 10 student = 150 * 10 = 1500 cm
1 Boy left is of height = 160 cm
1 Boy admitted is of height = 148
Now, Sum of the height of 10 student = 1500 - 160 + 148 = 1500 - 12 = 1488
New Average height of the 10 student in a class = 1488/10 = 148.8 cm
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