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If A and B are two events such that P(A)=0.5, P(B)=0.6 and P ( A B )=0.4 , then what is P( A B ) equal to ?

Options

  1. A0.9
  2. B0.7
  3. C0.5
  4. D0.3

Correct answer

D. 0.3

Step-by-step solution

P ( A )=0.5, P ( B )=0.6, P ( A B )=0.4 aligned & P( A B )=1-P(A B) & =1-[ P ( A )+ P ( B )- P ( A B )] & =1-[0.5+0.6-0.4] & =1-0.7=0.3 aligned

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