A box contains 12 transistors of type A and 18 of type B, all identical in appearance. If one transisto is taken at random, tested and returned to the box, and a second transistor then treated in the san manner, determine the probability that: (a) the first is type A and the second type B (b) both are type A (c) neither is type A.

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A box contains 12 transistors of type A and 18 of type B, all identical in appearance. If one transistor
is taken at random, tested and returned to the box, and a second transistor then treated in the same
manner, determine the probability that:
(a) the first is type A and the second type B
(b) both are type A
(c) neither is type A.
Transcribed Image Text:A box contains 12 transistors of type A and 18 of type B, all identical in appearance. If one transistor is taken at random, tested and returned to the box, and a second transistor then treated in the same manner, determine the probability that: (a) the first is type A and the second type B (b) both are type A (c) neither is type A.
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