Two-digit numbers with a given product of digits, drawn 4 times: event occurs at least 3 times
The same question, asked 2 times: 16 May 2023 S2*, 21 Apr 2025 S2. Every wording below, oldest first.
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Question 1
16 May 2023 S2
123Numbers are selected at random, one at a time from two-digit numbers 10, 11, 12, \ldots, 99 with replacement. An event E occurs if and only if the product of the two digits of a selected number is 18. If four numbers are selected, then probability that the event E occurs at least 3 times isTap an option to check your answer.
Question 2
21 Apr 2025 S2
101Numbers are selected at random, one at a time from the two-digit numbers , 99 with replacement. An event occurs only if the product of the two digits of a selected number is 24. If four numbers are selected, then probability, that the event E occurs at least 3 times, isTap an option to check your answer.