Soal SMP · Analisis · Kesulitan 3/5

Read the data: Class A average score = 75, Class B = 80. Class A has 20 students, Class B has 30. What is the combined average score?

A.77
B.77.5
C.78
D.78.5

Kunci jawaban & pembahasan

Jawaban: 78

Total points = 20*75 + 30*80 = 1500+2400=3900; total students=50; average=3900/50=78.

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