# P2b – Relative frequency

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Prerequisites

# Relative frequency (experimental probability)

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Callum flips a coin several times. The coin comes up heads 36 times. Callum worked out that the relative frequency of the coin coming up heads is $$\dfrac{9}{17}$$. How many times did he flip the coin?

Jamie flips a coin several times. The coin comes up tails 40 times. He then works out that the relative frequency of the coin coming up tails is $$\dfrac{11}{25}$$. Could Jamie be correct? If so, how many times did the coin come up heads? If he has made a mistake, explain how you know.

Teacher resources

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• Slides in PPTX (with click-to-reveal answers)
• Slides in PDF (one slide per page, suitable for importing into IWB software)
• Worksheet (with space for student work)
• Handout (slides with exercises only; 4 per page for reduced printing)
Links to past exam questions