Probability: Simulations and Predictions

On a subway, 8 out of 11 people are carrying a briefcase. Based on this information, if there are 700 people on the subway, then about how many DO NOT have a briefcase. Round your answer to the nearest whole number.

A container of beads contains 8 red beads, 7 yellow beads, and 6 green beads. A been will be drawn from the container and replaced 60 times. What is a reasonable prediction for the number of times a green or red bead is drawn?

On a youth soccer team, 3 out of 12 team members have played in previous years. Based on this information, if 144 kids are in the youth soccer league, then how many could be expected to have played the year before?

A fast food chain surveyed a random sample of students to determine what pizza they prefer. 40 people chose cheese pizza and 28 chose pepperoni. Based on the results, how many of the 340 students can be expected to prefer cheese pizza?

Eastside Middle School has 75% student participation in the fall carnival. Which one of the following simulations could model the probability of a student participating?

• Rolling a number cube, where rolling an odd number represents students who participate in the fall carnival

• Spinning a spinner with the equal sections marked with letters A-E, where spinning a vowel represent students who participate in the carnival

• Spinning a spinner with four equal sections numbered 1-4, where spinning anything but a 1 represents students who participate in the fall carnival