If A speaks the truth 20% of the times, B speaks the truth 80% of the times. What is the probability that at least one will tell the truth
Choose the most appropriate option
A) 0.82  B) 0.84  C) 1.5  D) 1.2  E) 1.4
probability of A speaks truth p(A)=2/10;false=8/10   probability of 0.84 speaks truth p(0.84)=8/10;false=2/10.For given qtn   Ans=1-(neither of them tell truth).0.84ecause A &amp; 0.84 are independent events   =1-[(8/10)*(2/10)]=1-16/100=1-0.16= 
<gadget id="calculator">1-0.16</gadget>
<output>0.84</output>
0.84   ANSWER:0.84
<result>B</result>
If A speaks the truth 20% of the times, B speaks the truth 80% of the times. What is the probability that at least one will tell the truth