Question: A transmitter is sending a message by using a binary code, namely, a sequence of 0's and 1's. Each transmitted bit (0 or 1) must

A transmitter is sending a message by using a binary code, namely, a sequence of 0's and 1's. Each transmitted bit (0 or 1) must pass through three relays to reach the receiver. At each relay, the probability is .20 that the bit sent will be different from the bit received (a reversal). Assume that the relays operate independently of one another.
Transmitter → Relay 1 → Relay 2 → Relay 3 → Receiver
a. If a 1 is sent from the transmitter, what is the probability that a 1 is sent by all three relays?
b. If a 1 is sent from the transmitter, what is the probability that a 1 is received by the receiver?
c. Suppose 70% of all bits sent from the transmitter are 1s. If a 1 is received by the receiver, what is the probability that a 1 was sent?

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The probability of a bit reversal is 2 so the probability of maintaining a bit is 8 ... View full answer

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