Tolong pake cara terima kasih.

= 100% - (20%-15%-30%)
= 100% - 65%
= 35%
.
= 35/100 x 320
= 11200/100
= 112.
.
C.112

100% - (20% + 15% + 30%)
100% - 65%
35%

35%/100% x 320 siswa
=112

semoga membantu