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In a survey, 70% of people prefer tea over coffee. If 10 people are surveyed, wh
In a survey, 70% of people prefer tea over coffee. If 10 people are surveyed, what is the expected number of tea drinkers?
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In a survey, 70% of people prefer tea over coffee. If 10 people are surveyed, what is the expected number of tea drinkers?
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Expected number = 70% of 10 = 0.7 * 10 = 7.
Questions & Step-by-step Solutions
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Q: In a survey, 70% of people prefer tea over coffee. If 10 people are surveyed, what is the expected number of tea drinkers?
Solution:
Expected number = 70% of 10 = 0.7 * 10 = 7.
Steps: 6
Show Steps
Step 1: Understand that 70% means 70 out of every 100 people prefer tea.
Step 2: We want to find out how many people out of 10 prefer tea.
Step 3: To find this, we calculate 70% of 10.
Step 4: Convert 70% to a decimal, which is 0.7.
Step 5: Multiply 0.7 by 10 to find the expected number of tea drinkers.
Step 6: Calculate 0.7 * 10 = 7.
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