Three cards are chosen at random from a standard 52-card deck. What is the probability that they are not all the same color?

1 answer:

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Three cards are selected from a standard deck of 52 cards. Disregarding the order in which they are drawn, the possible outcomes are (52/3). Out of these, how many include all cards of the same color (say red)? There are (13/3) ways in which you can get all 13 red cards.

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Prove that there is only one circle determined by three noncollinear points

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Answer:

O lies on the perpendicular bisector of AB. ... Then, O' will lie on the perpendicular bisector PQ and RS. We know that, two lines cannot intersect at more than one point, So O' must coincide with O. Hence, there is one and only one circle passing through three non collinear points

Step-by-step explanation:

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A class has 4 boys and 10 girls what is the ratio in the simplest form that compares numbet boys to total number of students

polet [3.4K]

Answer: 2 : 7

Step-by-step explanation:

Number of boys = 4

Number of girls = 10

Total number of students = total number of boys + total number of girls ,that is

Total number of students = 4 + 10