Answer Posted / chinna

Probability of A, speaking the truth, P(A)=80 %
=80/100 = 4/5

Probability of B, speaking the truth, P(cool.gif=60 %
=60/100 = 3/5


the probability that they tell the truth at the same time is
= P(A) * P(cool.gif
= 4/5 * 3/5
= 12/25
= 0.48

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