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Q: The probabilities that a student will receive an A, B, C or D grade are 0.4, 0.3 , 0.2 and 0.1 respectively. Find the probability that a student will receive Atleast B grade.

  • 1
    0.21
  • 2
    0.3
  • 3
    0.7
  • 4
    None of these
  • Show Answer
  • Workspace

Answer : 3. "0.7"
Explanation :

Answer: C) 0.7 Explanation: P(atleast B) = P( B or A) = P(B) + P(A) = (0.3) + (0.4) = 0.7

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