A box contains 25 cards marked 1 to 25. one card is drawn random. find the probability that it is marked with a number multiple of 4 or 7
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probability of card multiple of 4 or 7 is 9/25
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Sample space = {1,2,3,4.......,24,25}
All the integers.
Now multiples of 4 are 4,8,12,16,20,24
Now multiples of 7 are 7,14,21
(Had there been lot of numbers, we could have used Arithmetic progression to find number if terms)
Total favourable outcomes = 9
Total outcomes =25
Probability =9/25
Hope it helped.
All the integers.
Now multiples of 4 are 4,8,12,16,20,24
Now multiples of 7 are 7,14,21
(Had there been lot of numbers, we could have used Arithmetic progression to find number if terms)
Total favourable outcomes = 9
Total outcomes =25
Probability =9/25
Hope it helped.
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