Question 7 • NC-Math 4
If 90% arrive on time, then the probability a package is late is 0.10. The probability of exactly 2 late packages among 10 is (10 choose 2)(0.10)²(0.90)⁸ = 45 × 0.01 × 0.430467 ≈ 0.19. So the answer is C, 0.19.
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