A signal is transmitted over a noisy channel. It is known that the signal will be correctly

received with probability 0.85. Three signals are independently sent then:

(66) The probability that a signal is incorrectly received is:

(A) 0.24 (B) 0.22 (C) 0.15 (D) 0.85

(67) The probability that all 3 signals are incorrectly received is:

(A) 0.00338 (B) 0.45 (C) 0.0051 (D) 0.0616

(68) The probability that at least 1 signal is correctly received is:

(A) 0.0034 (B) 0.0249 (C) 0.15 (D) 0.9966

For Q. 52 - 53: If P(A) = 0.6 , P(B) = 0.5 and P(AB) = 0.8, then

(52) P(A B) is equal to:

(A) 0.80 (B) 0.70 (C) 0.50 (D) 0.90

(53) P(B|A) is equal to:

(A) 0.87 (B) 0.57 (C) 0.77 (D) 0.67