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Q.

A box contains cards numbered 11 to 123 . A card drawn at random from the box. Find  the probability that the number on the drawn card will be :


(i) Square number.


(ii) A multiple of 7.


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a

(i) Question Image , (ii) Question Image

b

(i) Question Image , (ii) Question Image

c

(i) Question Image , (ii) Question Image

d

(i) Question Image , (ii) Question Image  

answer is A.

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Detailed Solution

We have know that square numbers from 11 to 123   is
                                       and Question Image.Total square number from 11 to 123 = 8
Then the total cards which are numbered from 11 to 123 = 113
 (i) P (a square number )
 As we know that the multiples of 7  from 11 to 123  will be
                                                                                            then the total multiples of 7 from 11 to 123  = 16.
 (ii) Probability (a multiple of 7)
   
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