SOLUTION: If A and B as shown below are two dependent events, what is P(A or B)? P(A)= 1/5, P(B)= 2/7, P(A and B)=1/8 A) 91/280 B) 101/140 C) 101/280 D) 71/90

Algebra ->  Probability-and-statistics -> SOLUTION: If A and B as shown below are two dependent events, what is P(A or B)? P(A)= 1/5, P(B)= 2/7, P(A and B)=1/8 A) 91/280 B) 101/140 C) 101/280 D) 71/90      Log On


   

Question 1082419: If A and B as shown below are two dependent events, what is P(A or B)?
P(A)= 1/5, P(B)= 2/7, P(A and B)=1/8
A) 91/280
B) 101/140
C) 101/280
D) 71/90
Answer by math_helper(2461) About Me  (Show Source):
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P(A or B) = P(A) + P(B) - P(A and B)
= 1/5 + 2/7 - 1/8
= 56/280 + 2(40/280) - 35/280 = 101/280