Question

Average height of a group of 10 students is 160 cm. Three students of heights 146cm and 155 cm left the group. what will be the new average height of the group
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Answer 1

Step-by-step explanation:

let the sum of heights of all students be x

average height = sum of all students height /total no. of students

160 = x/10

x = 160×10

x = 1600

sum of heights who left the group = 146 + 155 = 301

therefore new sum of heights= 1600-301= 1299

no of students who left = 2

therefore new no. of students = 10-2= 8

new average height= 1299/8 = 162.375