bantu jawaaab ya terimakasihh

4. Mtk = 95 - 60 = 35
Fisika = 87-60 = 27

Mtk = 35
Fisika = 27
Yang suka keduanya = 60
35+27+60 = 122
143-122 = 21

a. 21 orang

6. rata² 15 murid = 52 x 15 = 780
rata² 25 murid = 48 x 25 = 1.200

780 + 1200 = 1.980
15 + 25 = 40

1980 : 40 = 49.5

c. 49.5

7. 3x2 = 6
4x3 = 12
5x4 = 20
6x5 = 30
7x3 = 21
8x2 = 16
9x1 = 9

6+12+20+30+21+16+9 = 114 : 20 = 5.7

c. 11 orang

Semoga membantu^^