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Byju's Answer
Standard XII
Mathematics
Complement of an Event
A box contain...
Question
A box contain cards numbered from
20
to
150
. A card is drawn at random from the box. Find the probability that the number of the drawn card is a multiple of
7
.
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Solution
Total number of cards=131
Multiple of 7 are 21,28,..,147=18
Probability=18/131
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