Solve the following
1. In certain digital communication system the probability of receiving the transmitted symbol incorrectly is 0.1. Because of fading if any symbol received incorrectly the probability that the subsequent symbols to be received incorrectly increased to 0.3. If you have received 3 symbols sequentially.What is the probability that (a) All are correct (b) Non of them is correct (c) Only 2 of them are correct (d) At least one symbol received correctly.