8-4 Check for Understanding

Last updated almost 3 years ago

12 questions

Fill in the blanks to correctly apply the addition rule for the event "a child ticket is bought for a play" or "the play is performed in the afternoon."

P(A or B) = _______ + _______ - _______.

What is Han's mistake?

What is the probability that a person selected at random is younger than 18 years old OR stretched before the game? (Answer with a simplified fraction, a decimal to the nearest hundredth, or a percentage.)

8-4 Check for Understanding

What is Han's mistake?

What is the probability that a person selected at random is younger than 18 years old OR stretched before the game? (Answer with a simplified fraction, a decimal to the nearest hundredth, or a percentage.)

A biologist studies two different invasive species in both wetland and coastal habitats. Purple loosestrife is present in 35% of the sites. Common reed is present in 55% of the sites. Both are present in 23% of the sites. What percentage of the sites have purple loosetrife or common reed present?

What percentage of the samples had an above average growth rate? (Round to the nearest whole percent).

What percentage of the samples at 70 degrees had an above average growth rate? (Round to the nearest whole percent).

What percentage of the samples were at 80 degrees? (Round to the nearest whole percent).

What percentage of the samples that had an average growth rate were at 80 degrees? (Round to the nearest whole percent).

What is Han's mistake?

What is the probability that a person selected at random is younger than 18 years old OR stretched before the game? (Answer with a simplified fraction, a decimal to the nearest hundredth, or a percentage.)

What is the probability that a student selected at random prefers to play tag at recess? (Answer with a simplified fraction, a decimal to the nearest hundredth, or a percentage.)

What is the probability that a student selected at random prefers to play tag or kickball at recess? (Answer with a simplified fraction, a decimal to the nearest hundredth, or a percentage.)

What is the probability that a student in class A selected at random prefers to play kickball at recess? (Answer with a simplified fraction, a decimal to the nearest hundredth, or a percentage.)

What is the probability that a student selected at random is in class B and prefers to play tag at recess? (Answer with a simplified fraction, a decimal to the nearest hundredth, or a percentage.)

A biologist studies two different invasive species in both wetland and coastal habitats. Purple loosestrife is present in 35% of the sites. Common reed is present in 55% of the sites. Both are present in 23% of the sites. What percentage of the sites have purple loosetrife or common reed present?

What percentage of the samples had an above average growth rate? (Round to the nearest whole percent).

What percentage of the samples at 70 degrees had an above average growth rate? (Round to the nearest whole percent).

What percentage of the samples were at 80 degrees? (Round to the nearest whole percent).

What percentage of the samples that had an average growth rate were at 80 degrees? (Round to the nearest whole percent).

What is the probability that a student selected at random prefers to play tag at recess? (Answer with a simplified fraction, a decimal to the nearest hundredth, or a percentage.)

What is the probability that a student selected at random prefers to play tag or kickball at recess? (Answer with a simplified fraction, a decimal to the nearest hundredth, or a percentage.)

What is the probability that a student in class A selected at random prefers to play kickball at recess? (Answer with a simplified fraction, a decimal to the nearest hundredth, or a percentage.)

What is the probability that a student selected at random is in class B and prefers to play tag at recess? (Answer with a simplified fraction, a decimal to the nearest hundredth, or a percentage.)