Question

Tolong jawab yang benar!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

((4)(3) + (5)(8) + (6)(10) + (7)(11) + (8)(6) + (9)(2)) / (3 + 8 + 10 + 11 + 6 + 2)
= (12 + 40 + 60 + 77 + 48 + 18) / 40
= 255 / 40
= 6,375

jumlah anak yang nilainya di atas 6,375 = 11 + 6 + 2
= 19 orang

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x = perempuan
y = laki-laki
(65)(x) + (56)(y) / (x + y) = 60
65x + 56y = 60x + 60y
65x - 60x = 60y - 56y
5x = 4y

misal x = 4
4y = 5(4)
4y = 20
y = 20 / 4
y = 5

perbandingan laki-laki : perempuan = 5 : 4

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15 / 100 * 360
= 54 derajat