Question

Ditentukan data A = 5, 8, 10, 12, 15 dan data B = 2, p, 6, 7. jika nilai rata-rata data A dua kali nilai rata-rata data B, maka berapakah nilai p?

Answer 1

Rata rata A = (5+8+10+12+15)/(5) = 50/5= 10
rata rata B = (2+p+6+7)/4 = (15+p) / 4

rata rata A = 2 kali rata rata B
10 = 2(15+p)/ 4
2(15+p) = 4(10)
30+ 2p = 40
2p = 40 -30
2p = 10
p = 5