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प्रश्न
A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, the probability that it bears a perfect square number is:
पर्याय
`1/10`
`1/11`
`1/90`
`1/9`
MCQ
उत्तर
`1/10`
Explanation:
Total number of box numbered from 1 to 90 = 90
Total number of perfect square = 9
i.e. S = (1, 4, 9, 16, 25, 36, 49, 64, 81)
P(s) = `9/90 = 1/10`
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Probability (Entrance Exam)
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