Probability - AIR questions

A coin is flipped 3 times.

What is the probability that the coin lands heads up once and tails up twice if order does not matter?

Zoey has a bag filled with coins. The bag contains 7 quarters, 8 dimes, 3 nickels and 9 pennies. She randomly chooses a coin from the bag. What is the probability that Zoey choose a quarter or nickel?

Write you answer as a percent.

Aryana drives by a stop light near her home once every morning. The stop light has red, yellow and green lights. She wants to know the probability of the light being red on two morning.

• red, yellow, green

• red/red

  yellow/yellow

  green/green

• red/yellow

  red/green

  yellow/red

  yellow/green

  green/red

  green/yellow

• red/red

  red/yellow

  red/green

  yellow/red

  yellow/yellow

  yellow/green

  green/red

  green/yellow

  green/green

Mrs. White grouped her students into 4 groups of equal size, labeled Red, Blue, Green and Yellow. Each day Mrs. White selects one group at random to solve a Math problem. The table shows the selected groups. Which group's observed frequency (experimental) is closest to its expected frequency (theoretical)?

• Red

• Blue

• Green

• Yellow

A pizza shop wants to determine how often it delivers to three areas of a city. The table shows the areas from a random sample of 80 deliveries. Based on this data, if the driver makes 200 deliveries, how many deliveries will be to the Southern area of the city?

A bag contains 25 cookies. There are 15 chocolate chip cookies, 7 peanut butter cookies, and the rest are oatmeal raisin. What is the probability of randomly choosing a chocolate chip or peanut butter cookie from the bag? Write your answer as a decimal.