Robert swims the 200-meter butterfly and the 150-meter freestyle at each swim meet. if he swims in 8 meets a year, how many meters will he swim?

200 x 8 equals 1600 and 150 x 8 equals 1200 then you would add it together to get 2800 meters.

1. If it is intersection then it SHOULD be included in both the sets right? Now we know that odd numbers from 1-100 but the second set are multiples of 5 from 50-150! So we mainly need to look for common numbers which are ODD and are a MULTIPLE OF 5 BETWEEN 50 - 100!! So A={51,53,57,59,6199} B={55,60,65,7095} [We stop till 100 because set A has no such element] So what is A ∩ B here? A ∩ B = {All odd numbers and multiples of 5 between 50 - 100}