Question

80 individuals were entered in an online giveaway and each participant was given a corresponding number between 1 and 80. What is the probability that the random number generator will select a number that is not a multiple of 9?

Answer 1

The probability that the random number generator will select a number that is not a multiple of 9 is 0.9.

Step-by-step explanation:

To find the probability that the random number generator will select a number that is not a multiple of 9, we need to determine the number of favorable outcomes and the total number of possible outcomes.

There are 8 numbers between 1 and 80 that are multiples of 9 (9, 18, 27, 36, 45, 54, 63, 72). So, the number of favorable outcomes is 80 - 8 = 72.

The total number of possible outcomes is 80.

Therefore, the probability that the random number generator will select a number that is not a multiple of 9 is 72/80 = 0.9.