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Cards marked with numbers 3,4,5...50 are …

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Cards marked with numbers 3,4,5...50 are placed in a box and mixed thoroughly. One card is drawn at random from the box. Find the probability that on the card drawn is 1)divisible by 7,2)a number which is a perfect square

Posted by Swetha Gp 8 years ago

CBSE > Class 10 > Mathematics

1 answers

Rajeev Malhotra 8 years ago

Total number of cards = 48

Number divisible by 7 are 7,14,21,28,35,42 and 49.

So probability = favourable outcomes/ total outcomes = 7/48

Number which are perfect squares are 4,9,16,25,36 and 49

So probability = 6/48= 1/8

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CBSE > Class 10 > Mathematics