Question

Tolong bantu saya menjawab soal nomor 1 dan 3

Answer 1

1). rata2 berat badan = 47 kg
berat badan = 44, 45, 46, 47, 48, 49, 50
frekuensi = 4, 3, 6, 6, 2, p, 4
rata2 = 
47 = 
47(25 + p) = 1165 + 49p
1175 + 47p = 1165 + 49p
1175 - 1165 = 49p - 47p
10 = 2p
p = 10 : 2 = 5

2). x= 40(51) - 90 / ( 40-1) 
     x= 2.040 - 90 /39 
     x = 1.950/39
     x= 50