Question

A box contains 20 cards numbered from 1 to20. a card is drawn at random from the box. find the probability that the number on the drawn card is divisible by 2 or 3.

Answer 1

Hi friend
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Your answer
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Number of cards in a box = 20

The cards are numbered 1 to 20.

Now,
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Numbers between 1 to 20 which ate divisible by 2 = 2, 4, 6, 8 , 10, 12, 14, 16, 18 , 20.

So, total number of cards divisible by 2 = 10

Probability of drawing a card divisible by 2 = 10/20 = 1/2 or 0.5

Again,
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Numbers between 1 to 20 which are divisible by 3 = 3,6,9,12,15,18.

So, total number of cards divisible by 3 = 6

Probability of drawing a card divisible by 3 = 6/20 = 3/10 or 0.3

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