Question

average height of a group of 10 student is 145 cm two more student of height 140 cm and 160 cm join the group what will be the new average height of a group​

Answer 1

Answer:

137.5

Step-by-step explanation:

total height of 10 students = 1450

when two students are added = 1450 + 140 + 160

= 1650

average height of 12 students = 1650 /12 = 137.5