P(none solves)=21⋅32⋅43=41. So P(at least one solves)=1−41=43.
Probabilities to solve a specific problem by A, B and C are 21,31 and 41 respectively. Probability that at least one will solve the problem is:
Held on 25 May 2023 · Verified 13 Jul 2026.
241
41
2423
43
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