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ICSE Class X Math 2016 Paper

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A game of number has cards marked with 11,12,13,...4011,12,13, . . . 40. A card is drawn at random. Find the Probability that the number on the card drawn is :
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Question : 13 of 57
Marks: +1, -0
A perfect square
Solution:  
Total number of all possible outcomes =30=30 .
Since required (favourable) outcomes are : 16,25 and 36 .
∴\therefore The number of favourable outcomes =3=3 .
∴P(\therefore P( A perfect square) =  330=  110= \;\frac{3}{30} = \;\frac{1}{10}
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