350 people are living in a particular village. There are three drinks tea, coffee and hot chocolate available in the village. Each citizen has to vote for one or more of the three drinks that he/she likes. It is known that 1) In total 120 people like tea and 160 people like coffee. 2) 46 people like all the three drinks. 3)62 people like both tea and hot chocolate. 4) 53 people like both hot chocolate and coffee. 5) 89 people lie both tea and coffee. How many people like only coffee and hot chocolate?Choices:- 8 11 7 13
Question
350 people are living in a particular village. There are three drinks tea, coffee and hot chocolate available in the village. Each citizen has to vote for one or more of the three drinks that he/she likes. It is known that 1) In total 120 people like tea and 160 people like coffee. 2) 46 people like all the three drinks. 3)62 people like both tea and hot chocolate. 4) 53 people like both hot chocolate and coffee. 5) 89 people lie both tea and coffee. How many people like only coffee and hot chocolate?Choices:- 8 11 7 13
Solution
To solve this problem, we need to use the principle of inclusion and exclusion. Here are the steps:
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Start with the total number of people who like each drink. We know that 120 people like tea and 160 people like coffee.
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Subtract the number of people who like all three drinks from each of these totals. This gives us 74 people who like tea but not all three drinks (120 - 46) and 114 people who like coffee but not all three drinks (160 - 46).
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Next, subtract the number of people who like both tea and hot chocolate from the number of people who like tea but not all three drinks. This gives us 12 people who like only tea and hot chocolate (74 - 62).
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Similarly, subtract the number of people who like both hot chocolate and coffee from the number of people who like coffee but not all three drinks. This gives us 61 people who like only coffee and hot chocolate (114 - 53).
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Finally, subtract the number of people who like both tea and coffee from the number of people who like only coffee and hot chocolate. This gives us the number of people who like only coffee and hot chocolate, which is -28 (61 - 89).
However, this result is not possible as the number of people cannot be negative. There seems to be a mistake in the problem statement. The number of people who like both tea and coffee (89) cannot be greater than the number of people who like coffee but not all three drinks (61). Please check the problem statement again.
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