The probability scale shows how likely the corner shop is to run out of stock of three items by closing time. 0 1 Milk Bread Newspapers © EAGLE BEACON GLOBA...
Question 1 Report
The probability scale shows how likely the corner shop is to run out of stock of three items by closing time.
- Write down which item is least likely to run out. (1)
- Write down the probability that the shop runs out of bread. (1)
- Work out the probability that the shop does not run out of bread. (1)
Answer Details
Each dot's horizontal position on the scale from 0 to 1 gives that item's probability of running out; milk's dot is furthest left (least likely), and bread's sits at 0.6.
- [1] Milk's dot is closest to 0, so milk is least likely to run out.
- [1] \[ P(\text{bread runs out}) = 0.6 \]
- [1] \[ P(\text{bread does not run out}) = 1 - 0.6 = 0.4 \]
The position furthest left on a probability scale always corresponds to the least likely event; this comparison can be made directly from the diagram without needing to read exact numerical values for every dot.
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