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**In a communication network, a packet of length L bits takes link L1 with a probability of p _{1}or link L2 with a probability of p_{2}. Link L1 and L2 have bit error probability of b_{1} and b_{2}respectively. The probability that the packet will be received without error via either L1 or L2 is**

**A) (1-b1)Lp1+(1-b2)Lp2**

**B) [1 - (b1 + b2)L]p1p2**

**C) (1 - b1)L (1 - b2)Lp1p2 **

**D) 1 - (b1Lp1 + b2Lp2)**

closed as a duplicate of:
GATE2005-IT-74

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