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  • There are 3 red socks, 4 green socks and 3 blue socks, you choose 2 socks. The probability that they are of the same colour is _____.Option: 1 <img a

There are 3 red socks, 4 green socks and 3 blue socks, you choose 2 socks. The probability that they are of the same colour is _____.

Option: 1

1 / 5


Option: 2

7 / 30


Option: 3

1 / 4


Option: 4

4 / 15


Answers (1)

best_answer

\mathrm{\text { Req. Probability }=\frac{{ }^3 \mathrm{C}_2+{ }^4 \mathrm{C}_2+{ }^3 \mathrm{C}_2}{{ }^{10} \mathrm{C}_2}=\frac{4}{15}}

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Rakesh

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