Answer :
Final answer:
A. 12/25
The probability is then given by 24/50 = 12/25.
Explanation:
To find the probability that a number selected at random from the first 50 natural numbers is a multiple of 3 or 4, we need to find the number of multiples of 3 or 4 in the range 1-50.
There are 16 multiples of 3 and 12 multiples of 4 in this range. However, some numbers are counted twice as they are multiples of both 3 and 4.
So, we subtract the number of numbers that are multiples of both 3 and 4. There are 4 numbers that are multiples of both 3 and 4.
Therefore, the total number of numbers that are multiples of 3 or 4 is 16 + 12 - 4 = 24. The probability is then given by 24/50 = 12/25.