NDA 2025 Mathematics question

An integer is chosen at random from the first 50 integers. What is the probability that the integer is neither divisible by 5 nor 9?

Answer: (B)

Solution

Among 1 to 50: multiples of 5 number 10; multiples of 9 number 5 (9, 18, 27, 36, 45); multiples of both (i.e. of 45) number

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Question ID VK-030244