Respuesta :

mhanifa

Answer:

  • B. The probability that the student received a grade better than C is 0.45

Step-by-step explanation:

Total number of students:

  • 15 + 30 + 35 + 16 + 4 = 100

Statements

A.

  • p(<D) = 4/100 = 0.04
  • 0.04 ≠ 0.2
  • Incorrect

B.

  • p(>C) = (30 + 15)/100 = 45/100 = 0.45
  • 0.45 = 0.45
  • Correct

C.

  • p(not A or B) = (100 - 15 - 30)/100 = 55/100 = 0.55
  • 0.55 ≠ 0.45
  • Incorrect

D.

  • p(B or C) = (30 + 35)/100 = 65/100 = 0.65
  • 0.65 ≠ 0.35
  • Incorrect

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