.
4. A batch of 400 iron rods consists of 100 oversized rods, 100 undersized rods, and 200 of desired length.
If two rods are drawn at random without replacement, what is the probability of obtaining
(i) two rods of desired length.
(ii) exactly one of the desired length
(iii) none of the desired length
(iv) Two undersized rods.
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(i) P = = .
(ii) P = = = .
(iii) P = = .
(iv) P = = .
Solved.