Unit 7 test: Probability

The probability that it snows in Miami tomorrow is $0.01$. Which word best describes this event?

A bag holds $6$ red, $4$ blue and $5$ green marbles. You pick one without looking. What is the probability that it is green?

The probability that Leo wins a game is $0.35$. What is the probability that he does not win? Give your answer as a decimal.

A spinner was spun $30$ times and landed on red $9$ times. What is the experimental probability of landing on red? Give your answer as a fraction in simplest form.

You roll a fair number cube $300$ times. About how many times should you expect to roll a $1$ or a $2$?

In a random group of $80$ students at a school, $12$ are left-handed. The school has $600$ students. About how many of them would you predict are left-handed?

A fair coin lands tails $6$ times in a row. What is the probability that it lands heads on the next flip?

A probability model has four outcomes. Three of the probabilities are $0.15$, $0.4$ and $0.3$. What is the fourth probability?

A spinner is $\dfrac{3}{8}$ red and $\dfrac{1}{4}$ blue. The rest is yellow. What is the probability of landing on yellow?

Which situation is best described by a non-uniform probability model?

You flip a coin and roll a number cube. What is the probability of getting tails and a number greater than $4$?

You roll two number cubes and add the numbers. What is the probability that the sum is $6$?

A lunch special comes with one of $4$ sandwiches, one of $3$ drinks and one of $2$ desserts. How many different lunches are possible?

Two spinners each have $3$ equal sections numbered $1$, $2$ and $3$. You spin both and add the numbers. What is the probability that the sum is even?

A store's delivery van breaks down on $20\%$ of days. To simulate $2$ days, Sam uses pairs of random digits, where $0$ and $1$ mean a breakdown and $2$ through $9$ mean no breakdown. Here are his $10$ trials.

$37 \quad 81 \quad 04 \quad 95 \quad 62 \quad 18 \quad 49 \quad 73 \quad 20 \quad 56$

Based on his simulation, what is the probability that the van breaks down on at least one of the $2$ days?