Question

the average height of 20 students of a class is 105 if 10 more students of average height of 120 CM join the class then the average height of the class is what​

Answer 1

number of students = 20

average height = 105

total height of 20 students = 105×20

= 2100

more students added = 10

average height of new students = 120

total height of 10 students = 120×10

= 1200

now add the totals = 2100+1200=3300

total students = 30

divide the answer by total number odf students = 3300÷30=110

ANSWER = 110 is the averageheight of students