taiwan-gsat 2023 Q5

taiwan-gsat · Other · gsat__math-b 5 marks Conditional Probability Conditional Probability with Discrete Random Variable
A bag contains 100 balls numbered $1, 2, \ldots, 100$ respectively. A person randomly draws one ball from the bag, and each ball has an equal probability of being drawn. Under which of the following conditions is the conditional probability that the person draws ball number 7 the largest?
(1) The number of the ball drawn is odd (2) The number of the ball drawn is prime (3) The number of the ball drawn is a multiple of 7 (4) The number of the ball drawn is not a multiple of 5 (5) The number of the ball drawn is less than 10
A bag contains 100 balls numbered $1, 2, \ldots, 100$ respectively. A person randomly draws one ball from the bag, and each ball has an equal probability of being drawn. Under which of the following conditions is the conditional probability that the person draws ball number 7 the largest?

(1) The number of the ball drawn is odd
(2) The number of the ball drawn is prime
(3) The number of the ball drawn is a multiple of 7
(4) The number of the ball drawn is not a multiple of 5
(5) The number of the ball drawn is less than 10