csat-suneung 2023 Q25

csat-suneung · South-Korea · csat__math 3 marks Probability Definitions Probability Using Set/Event Algebra

A box contains 5 white masks and 9 black masks. When 3 masks are randomly drawn simultaneously from the box, what is the probability that at least one of the 3 masks is white? [3 points]
(1) $\frac { 8 } { 13 }$
(2) $\frac { 17 } { 26 }$
(3) $\frac { 9 } { 13 }$
(4) $\frac { 19 } { 26 }$
(5) $\frac { 10 } { 13 }$

A box contains 5 white masks and 9 black masks. When 3 masks are randomly drawn simultaneously from the box, what is the probability that at least one of the 3 masks is white? [3 points]\\
(1) $\frac { 8 } { 13 }$\\
(2) $\frac { 17 } { 26 }$\\
(3) $\frac { 9 } { 13 }$\\
(4) $\frac { 19 } { 26 }$\\
(5) $\frac { 10 } { 13 }$

Paper Questions

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