The graph shows the change in the price of a stock over time. с
D
E
Stock Price
Time
Identify the time intervals for which the stock price increased, decreased, or remained constant.
Move the intervals to the appropriate column in the table.
Stock Price Increased Stock Price Decreased Stock Price Remained constant
А A
B
с
D
E

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}