Three integers are chosen at random from the first 20 integers. The pr

1.	Three integers are chosen at random from the first 20 integers. The probability that their product is even isA. 2/19B. 3/29C. 17/19D. 4/19
Answer» Correct option is C. 17/19 The product of 3 randomly chosen integers are even only if there are even nos. P(even) = 1 - P(odd) P(odd) = \(\cfrac{10}{20}\times\cfrac9{19}\times\cfrac8{18}\) = \(\cfrac2{19}\) P(even) = \(\cfrac{17}{19}\)

Three integers are chosen at random from the first 20 integers. The probability that their product is even isA. 2/19B. 3/29C. 17/19D. 4/19

Answer»

Correct option is C. 17/19

The product of 3 randomly chosen integers are even only if there are even nos.

P(even) = 1 - P(odd)

P(odd) = \(\cfrac{10}{20}\times\cfrac9{19}\times\cfrac8{18}\)

= \(\cfrac2{19}\)

P(even) = \(\cfrac{17}{19}\)

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Three integers are chosen at random from the first 20 integers. The probability that their product is even isA. 2/19B. 3/29C. 17/19D. 4/19

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