Soal SMP · Soal cerita · Kesulitan 2/5

A student scores 75, 80, and 85 on three tests. What score must he get on the fourth test to have an average of 85?

A.90
B.95
C.100
D.85

Kunci jawaban & pembahasan

Jawaban: 90

Total needed for average 85 over 4 tests = 4 × 85 = 340; current total = 75+80+85 = 240; fourth score = 340 - 240 = 100.

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