Average age of 7 family members is 75 years.But average age of 6 of them is 74 years 6 months.What is the age of the 7th family member?75786880
Question
Average age of 7 family members is 75 years. But average age of 6 of them is 74 years 6 months. What is the age of the 7th family member?
Solution
To find the age of the 7th family member, we can follow these steps:
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First, find the total age of all 7 family members. Since the average age is 75 years, the total age would be 75 years * 7 = 525 years.
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Then, find the total age of the 6 family members. Since their average age is 74 years and 6 months, convert the 6 months into half a year (0.5 years) to make the calculation easier. So, the total age of the 6 family members would be 74.5 years * 6 = 447 years.
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Finally, subtract the total age of the 6 family members from the total age of all 7 members to find the age of the 7th member. So, the age of the 7th member would be 525 years - 447 years = 78 years.
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