Civil Services UPSC EPFO (EO/AO) Mock Test 2023 Quantitative Aptitude Probability

There are certain number of pink flowers, 4 red flowers and 5 yellow flowers in a garden. If 2 flowers are picked up and the probability that both are yellow flowers is 2 / 21, then find the number of pink flowers in the garden?

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4
2
5
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4
8
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