If 45% of people like tea, 35% like coffee, and 10% like both, what percentage l

Practice Questions

Q1
If 45% of people like tea, 35% like coffee, and 10% like both, what percentage like neither tea nor coffee?
  1. 10%
  2. 20%
  3. 30%
  4. 40%

Questions & Step-by-Step Solutions

If 45% of people like tea, 35% like coffee, and 10% like both, what percentage like neither tea nor coffee?
  • Step 1: Identify the percentage of people who like tea, which is 45%.
  • Step 2: Identify the percentage of people who like coffee, which is 35%.
  • Step 3: Identify the percentage of people who like both tea and coffee, which is 10%.
  • Step 4: To find the percentage of people who like either tea or coffee, add the percentages of tea and coffee, then subtract the percentage of those who like both: 45% + 35% - 10%.
  • Step 5: Calculate the result from Step 4: 45% + 35% = 80%, then 80% - 10% = 70%.
  • Step 6: To find the percentage of people who like neither tea nor coffee, subtract the percentage from Step 5 from 100%: 100% - 70%.
  • Step 7: Calculate the result from Step 6: 100% - 70% = 30%.
  • Set Theory – Understanding the union and intersection of sets to calculate percentages.
  • Percentage Calculation – Calculating percentages based on given data and applying the principle of inclusion-exclusion.
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