describe how you know that (8 + 9) +3 is equilevant to 8+ (9 + 3). What is the benefit to using this property?

How can you find the conditional probability of a given b as the fraction of b’s outcomes that also belong to a, and interpret the answer in terms of the model? i just need a good explanation

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

You have 138.72 in your saving account u take out 45.23 and 18.00 you deposit 75.85 into your account