Average height of a group of 10 students is 160 cm. Three students of heights 140 cm, 142 cm and 155 cm left the group. What will be the new average height of the group.
Answers
Answered by
10
Answer:
166.14
Step-by-step explanation:
let the sum of height of all students be x
average height=sum of all students' height/total no. of students
160=x/10
x=160×10=1600
sum of heights who left the group=140+142+155=437
therefore,new sum of heights =1600-437=1163
no. of students who left=3
therefore, new no. of students=10-3=7
new average height=1163/7=166.14
Answered by
16
Let the sum 0f all students height be x
then average:-160
Then 3 student who left their height
The height of 7 students=1600-437
=> 1163
And their average=
Similar questions