What was the total number of schools having exactly three of the four facilities?

From the passage: Sixteen patients in a hospital must undergo a blood test for a disease...

Suppose one of the lab assistants accidentally mixed two patients' blood samples before they were distributed to the vials. Which of the following correctly represents the set of all possible numbers of positive test results out of the eight vials?

From the passage: XYZ organization got into the business of delivering groceries to home...

Among the following days, the largest fraction of orders booked on which day was lost?

From the passage: Sixteen patients in a hospital must undergo a blood test for a disease...

Which of the following combinations of test results is NOT possible?

From the passage: Sixteen patients in a hospital must undergo a blood test for a disease...

Suppose vial A tests positive and vials D and G test negative. Which of the following vials should we test next to identify the patient with the disease?

From the passage: Sixteen patients in a hospital must undergo a blood test for a disease...

Suppose vial C tests positive and vials A, E and H test negative. Which patient has the disease?

From the passage: XYZ organization got into the business of delivering groceries to home...

On which of the following days was the number of orders booked the highest?

From the passage: XYZ organization got into the business of delivering groceries to home...

The delivery ratio for a given day is defined as the ratio of the number of orders booked on that day which are delivered on the next day to the number of orders booked on that day which are delivered on the second day after booking. On which of the following days, was the delive…

From the passage: XYZ organization got into the business of delivering groceries to home...

The average time taken to deliver orders booked on a particular day is computed as follows. Let the number of orders delivered the next day be x and the number of orders delivered the day after be y. Then the average time to deliver order is (x+2y)/(x+y). On which of the followin…