Mathematics
Mathematics
Problem
A school canteen sells only tea, coffee and milkshake. On a particular day 120 students bought drinks: 45 bought tea, 50 bought coffee and the rest bought milkshake. If one student is selected at random, what is the probability that the student bought tea or milkshake? a) b) c) d)Intuitive explanation
This is a straightforward probability problem about finding the chance of an event from categorical data. The key insight is recognizing that "tea or milkshake" means you need to count both groups of students, then divide by the total. First, figure out how many students bought milkshake (it's the remainder after tea and coffee), then add the tea and milkshake counts together and divide by 120.
Intuitive explanation
This is a straightforward probability problem about finding the chance of an event from categorical data. The key insight is recognizing that "tea or milkshake" means you need to count both groups of students, then divide by the total. First, figure out how many students bought milkshake (it's the remainder after tea and coffee), then add the tea and milkshake counts together and divide by 120.