Question

the average height of 20 boys is 120cm and the average height of 10 girls is 117 cm. find the average height of these 30 students//////////////// brainlisted question/////////////only for the intelligent one

Answer 1

=117+120/2
=237/2
=118.5cm

Answer 2

average height of boys=120
height of a single boy=120/20
=6
average height of girls=117/10
=11.7
average height of 30 students=30×17.7
=531