The probability of randomly pulling out a pineapple candy is 4/7, considering the given probabilities for the other flavors, leading to answer option B.
The question asks for the probability of randomly pulling out a pineapple candy from a bowl that contains orange, strawberry, and pineapple flavored candies. Given that the probability of an orange candy is 1/7 and a strawberry candy is 2/7, we need to find the missing probability for the pineapple candy.
To find the probability of pulling out a pineapple candy, we need to subtract the probabilities of the other two flavors from the total probability, which is always 1. So:
Total probability = Probability of orange + Probability of strawberry + Probability of pineapple
1 = 1/7 + 2/7 + Probability of pineapple
Solving for the probability of pineapple:
Probability of pineapple = 1 - (1/7 + 2/7) = 1 - 3/7 = 4/7
Therefore, the answer is 4/7, which corresponds to option B.