All Common Core: 7th Grade Math Resources
Example Questions
Example Question #181 : Statistics & Probability
What is the probability of flipping a coin three times, with the coin landing on heads all three times, and rolling a number on a die other than
There are two sides to a coin: heads and tails. The probability of the coin landing on heads is
To determine the probability of the coin landing on heads three times in a row, we take the probability of the coin landing on heads and multiply it three times.
Based on the question, we want to combine the probability of flipping a coin three times, with the coin landing on heads all three times, with the probability of rolling any number on a die except . There are sides to a die, and five sides that aren't the number ; thus, the probability of rolling any number on a die except is
We want the probability of all of these events occurring, so we need to multiply:
Example Question #182 : Statistics & Probability
A student flips a coin four times and rolls a six-sided die. What is the probability that the coin will land on heads all four times and the die will show a ?
There are two sides to a coin: heads and tails. The probability of the coin landing on heads is
To determine the probability of the coin landing on heads four times in a row, we take the probability of the coin landing on heads and multiply it four times.
Based on the question, we want to combine the probability of flipping a coin four times, with the coin landing on heads all four times, with the probability of rolling a on a die. There are sides to a die, and only one of those sides has the number ; thus, the probability of rolling a on a die is
We want the probability of all of these events occurring, so we need to multiply: