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The numbers 1 to 50 are in a hat. The probability of drawing a multiple of 5 is 10/50. What is the probability of NOT drawing a multiple of 5?

User Fattum
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Answer:

Explanation:

If you write down the multiples of 5 which are 5, 10, 15, 20, 25, 30 ,35 ,40, 45, 50, 55, 60.

And, write down all the numbers until 50: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50.

If you then circle/spot the ones that are not multiples of 5 on the list of numbers up to 50 there are the numbers: 1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 18, 19, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31, 32, 33, 34, 36, 37, 38, 39, 41, 42, 43, 44, 46, 47, 48, 49. There are 49 numbers which aren't a multiple of 5 therefore, the probability of getting a multiple of 5 is 41/50

User Omeriko
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