Cai's school is selling 100 raffle-tickets to raise money for a new gymnasium. The grand-prize is a ten-speed mountain bike. Which word or phrase describes the probability that he will win the raffle if he buys all the tickets?an equal chance or 50−50unlikelylikelycertain
Q. Cai's school is selling 100 raffle-tickets to raise money for a new gymnasium. The grand-prize is a ten-speed mountain bike. Which word or phrase describes the probability that he will win the raffle if he buys all the tickets?an equal chance or 50−50unlikelylikelycertain
Understand the problem: Understand the problem.We need to determine the probability that Cai will win the raffle if he buys all the tickets. Probability is the measure of the likelihood that an event will occur, and it is calculated as the number of favorable outcomes divided by the total number of possible outcomes.
Identify possible outcomes: Identify the total number of possible outcomes.The total number of possible outcomes is the total number of raffle tickets, which is 100.
Identify favorable outcomes: Identify the number of favorable outcomes.Since Cai is buying all the raffle tickets, the number of favorable outcomes for him is also 100, because he will have every ticket.
Calculate probability: Calculate the probability.The probability that Cai will win is the number of favorable outcomes divided by the total number of possible outcomes.Probability = Number of favorable outcomes / Total number of possible outcomesProbability = 100100Probability = 1
Interpret the probability: Interpret the probability.A probability of 1 means that the event is certain to happen. Therefore, if Cai buys all the tickets, it is certain that he will win the raffle.
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