" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Rata rata kelas 7B= 72
Jumlah siswa 7B=25
Rata rata 7A&7B=75
Jumlah nilai siswa 7b=
25×72=1800
80a+1800/25+a=75
80a+1800=1875+75a
5a=75
a=15
Jadi, jumlah siswa kelas 7a=15 orang.