Probability distribution of the number of defective items drawn without replacement
This type of question, asked 2 times: 22 Apr 2025 S2, 13 Apr 2026 S2. All 2 questions below, oldest first.
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Question 1
22 Apr 2025 S2
148
Four defective oranges are accidentally mixed with sixteen good ones. Three oranges are drawn from the mixed lot. The probability distribution of defective oranges is
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Question 2
13 Apr 2026 S2
99
It is known that a box of 8 batteries contains 3 defective pieces and a person randomly selects 2 batteries from this box. Then the probability distribution of the number of defective batteries is