Soal SMA · Soal cerita · Kesulitan 3/5

A student has a 70% chance of passing a test. If the student takes 5 tests, what is the probability of passing exactly 3? (Use binomial probability)

A.0.1323
B.0.3087
C.0.02835
D.0.00243

Kunci jawaban & pembahasan

Jawaban: 0.3087

P(X=3) = C(5,3)*(0.7)³*(0.3)² = 10*0.343*0.09 = 0.3087.

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