Question 4(a)(i)
[Maximum number: 3]
A supermarket analyses the shopping habits of its customers.
The number of times, X, each customer visits the supermarket in a week is given by the following probability distribution.
Find the value of a.
IB Maths AA SL 4.5 Probability Basics
Practise constructing sample spaces and using counts, complements and relative frequency to calculate probabilities, expected occurrences and valid unknown constants.
How this is tested
- list or count equally likely outcomes before using favourable outcomes divided by the total
- use a complement when it avoids counting several unwanted outcomes separately
- solve for an unknown probability and reject values outside the interval from zero to one