7.8.07
The probability of a certain brand of battery going dead within 15 hours is 1/3. Noah has a toy that requires 4 of these batteries. He wants to estimate the probability that at least one battery will die before 15 hours are up.
The probability of a certain brand of battery going dead within 15 hours is 1/3. Noah has a toy that requires 4 of these batteries. He wants to estimate the probability that at least one battery will die before 15 hours are up.
Noah will simulate the situation by putting marbles in a bag. Drawing one marble from the bag will represent the outcome of one of the batteries in the toy after 15 hours. Red marbles represent a battery that dies before 15 hours are up, and green marbles represent a battery that lasts longer.
How many marbles of each color should he put in the bag? Explain your reasoning.
Noah will simulate the situation by putting marbles in a bag. Drawing one marble from the bag will represent the outcome of one of the batteries in the toy after 15 hours. Red marbles represent a battery that dies before 15 hours are up, and green marbles represent a battery that lasts longer.
How many marbles of each color should he put in the bag? Explain your reasoning.
After doing the simulation 5 times, Noah has the following results.
What should he use as an estimate of the probability that at least one battery will die within 15 hours?
After doing the simulation 5 times, Noah has the following results.
What should he use as an estimate of the probability that at least one battery will die within 15 hours?