Soal SMA · Soal cerita · Kesulitan 2/5

The average score of 15 students in a mathematics test is 72. After one more student takes the test, the average becomes 73. What is the score of the new student?

A.85
B.87
C.88
D.90

Kunci jawaban & pembahasan

Jawaban: 88

Total before = 15 × 72 = 1,080; total after = 16 × 73 = 1,168; new score = 88.

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