Soal SMP · Soal cerita · Kesulitan 3/5

A bag contains red and blue marbles in the ratio 3:5. If there are 40 marbles in total, how many red marbles are there?

A.15
B.12
C.20
D.25

Kunci jawaban & pembahasan

Jawaban: 15

Total parts = 3 + 5 = 8. Each part = 40/8 = 5. Red marbles = 3 × 5 = 15.

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