Mathematics, 17.04.2020 18:03, makenziehook8
A security alarm requires a four-digit code. The code can use the digits 0–9 and the digits cannot be repeated.
Which expression can be used to determine the probability of the alarm code beginning with a number greater than 7?
StartFraction (2 P 1) (9 P 3) Over 10 P 4 EndFraction
StartFraction (2 C 1) (9 C 3) Over 10 C 4 EndFraction
StartFraction (10 P 1) (9 P 3) Over 10 P 4 EndFraction
StartFraction (10 C 1) (9 C 3) Over 10 C 4 EndFraction
Answers: 3
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