A family of 5 members has a mean age of 32. After 2 years, grand mother dies at the age of 64. What will be the mean age of remaining members after 5 years from now?
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a family has 5 members: mean age is 32.
therefore, total age = 5 * 32 = 160 years
after 2 years the total age will be = (2*5)+160 = 170 years
grandmother dies in 64 year.
therefore, new age total = 170 - 64 = 106 years
total age after 5 years = (4 * 5) + 106 = 20 + 106 = 126
new mean age = 126/4 = 31.5 years
therefore, total age = 5 * 32 = 160 years
after 2 years the total age will be = (2*5)+160 = 170 years
grandmother dies in 64 year.
therefore, new age total = 170 - 64 = 106 years
total age after 5 years = (4 * 5) + 106 = 20 + 106 = 126
new mean age = 126/4 = 31.5 years
Shreya69614:
but the answer is 29.5
which book do you have.
Okay, i get it now. Thanks for helping
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Answer:
a family has 5 members: mean age is 32.
therefore, total age = 5 * 32 = 160 years
after 2 years the total age will be = (2*5)+160 = 170 years
grandmother dies in 64 year.
therefore, new age total = 170 - 64 = 106 years
total age after 5 years = (4 * 5) + 106 = 20 + 106 = 126
new mean age = 126/4 = 31.5 years
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