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4024/11 Oct/Nov 2020, Question 7: Tally Charts and Frequency Tables

Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 2 marks

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The question, in short

From a list of 18 students' Monday email counts, fill in the missing frequencies in a grouped table, then use a given probability of 9/20 for five emails to find the probability of not receiving five emails.

Summarised in our own words. Use the official paper for the exact wording and any diagrams.

Part (a) · 1 mark

Count how many of the 18 listed values fall into each group: 0 to 5, 6 to 10, and 11 to 15, and write the frequencies.

  1. 10 to 5: 4, 3, 5 → 3
  2. 26 to 10: 6, 9, 7, 8, 7, 6, 6, 9 → 8
  3. 311 to 15: 12, 14, 11, 11, 14, 13, 12 → 7

Answer| 0 to 5 | 3 | | 6 to 10 | 8 | | 11 to 15 | 7 |

Part (b) · 1 mark

Given that the chance of a student having five emails is 9/20, state the chance that the student does not have five emails.

  1. 1P(not five) = 1 − 9/20
  2. 2= 11/20

Answer11/20

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Also searched as: 4024/11/O/N/20 · 4024_w20_qp_11 · 4024 w20 11 · question 7.
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