Paper 22 Q6(a)IGCSE 0580 May/June 2023

Question

ξ ={x|1⩽x⩽20} E= {even numbers} M= {multiples of 5} Find n(M).

This question tests your ability to identify elements in a set and count them using set notation. Understanding how to work with sets and find the number of elements is fundamental for probability and statistics.

Step-by-Step Solution

Key Takeaway

To find n(M), list all elements in set M within the given universal set, then count them.

Common Mistakes

Including multiples of 5 outside the universal set range, such as 25 or 30, when the set is limited to numbers between 1 and 20
Confusing the sets and finding multiples of a different number, or mixing up set E (even numbers) with set M (multiples of 5)

Exam Tip

Always check that your elements fall within the universal set's boundaries before counting them.

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