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Helga [31]
3 years ago
6

A store has 80 modems in its inventory, 30 coming from source a and the remainder from source

Mathematics
1 answer:
Mrrafil [7]3 years ago
5 0
The number of defective modems in the inventory is 20%⋅ 30 + 8%⋅ 50 = 10 (out of 80). Note that the number of defectives in the inventory is fixed, i.e., we are not told that there is 1 8 probability that a modem in the inventory is defective, but rather that exactly 1 8 of all modems are defective. The probability that exactly two modems in a random sample of five are defective is = 0.102
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