Pergunta

65) Suppose 3 of a dozen oranges are bruised and 2 are chosen at random from the dozen.The probability that both are bruised is: 1/22 1/11 o 1/6 o 1/4 o 1/3 o x No Answer Selected
Solução

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KauaneMestre · Tutor por 5 anos
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To solve this problem, we need to find the probability of choosing 2 bruised oranges out of the 3 bruised oranges in the dozen.
Given information:
- There are 3 bruised oranges out of a dozen (12 oranges).
- 2 oranges are chosen at random from the dozen.
Step 1: Find the probability of choosing the first bruised orange.
Probability of choosing the first bruised orange = Number of bruised oranges / Total number of oranges
Probability of choosing the first bruised orange = 3 / 12 = 1/4
Step 2: Find the probability of choosing the second bruised orange.
After choosing the first bruised orange, there are 2 bruised oranges left and 11 oranges in total.
Probability of choosing the second bruised orange = Number of bruised oranges left / Total number of oranges left
Probability of choosing the second bruised orange = 2 / 11
Step 3: Find the probability of choosing both bruised oranges.
Probability of choosing both bruised oranges = Probability of choosing the first bruised orange × Probability of choosing the second bruised orange
Probability of choosing both bruised oranges = (1/4) × (2/11) = 2/44 = 1/22
Therefore, the probability that both oranges chosen are bruised is 1/22.
The correct answer is:
Given information:
- There are 3 bruised oranges out of a dozen (12 oranges).
- 2 oranges are chosen at random from the dozen.
Step 1: Find the probability of choosing the first bruised orange.
Probability of choosing the first bruised orange = Number of bruised oranges / Total number of oranges
Probability of choosing the first bruised orange = 3 / 12 = 1/4
Step 2: Find the probability of choosing the second bruised orange.
After choosing the first bruised orange, there are 2 bruised oranges left and 11 oranges in total.
Probability of choosing the second bruised orange = Number of bruised oranges left / Total number of oranges left
Probability of choosing the second bruised orange = 2 / 11
Step 3: Find the probability of choosing both bruised oranges.
Probability of choosing both bruised oranges = Probability of choosing the first bruised orange × Probability of choosing the second bruised orange
Probability of choosing both bruised oranges = (1/4) × (2/11) = 2/44 = 1/22
Therefore, the probability that both oranges chosen are bruised is 1/22.
The correct answer is:
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