Final answer:
To calculate the probability, divide the number of numbers that are not multiples of 4 by the total number of possible outcomes.
Step-by-step explanation:
To find the probability that the spinner will land on a number that is not a multiple of 4, we first need to determine how many numbers are multiples of 4 from 1 to 50. We can divide 50 by 4 and round down to find that there are 12 multiples of 4. Therefore, there are 50 - 12 = 38 numbers that are not multiples of 4.
The probability is equal to the number of favorable outcomes (landing on a number that is not a multiple of 4) divided by the total number of possible outcomes (all 50 numbers on the spinner). So, the probability is 38/50 = 0.76.