Question: Three relays, A, B, and C, are connected as in the Figure. Their role is to enable the connection between terminals I and II. Relay

Three relays, A, B, and C, are connected as in the Figure. Their role is to enable the connection between terminals I and II. Relay A fails with probability 0.18, and relays B and C fail with equal probabilities of 0.22. Find the average number of times the scheme is turned on until the first failure occurs

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