Quantitative Aptitude Ques 1617

Question: 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 [FCI (Assistant) Grade III 2015]

Options:

A) 1/10

B) 1/11

C) 1/90

D) 1/9

Show Answer

Answer:

Correct Answer: A

Solution:

  • [a] Perfect square numbers between 1 to 90 =1, 4, 9, 16, 25, 36, 49, 64, 81 = 9
    $ \therefore $ Probability to get a perfect square numbers $ =\frac{9}{90}=\frac{1}{10} $
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