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Four years hence the average of 6 members is 45. Now a person is added and the avg becomes 48. What is the age of added person?

Read Solution (Total 3)

avg of present ages of 6 members= 45-4=41
total of present ages of 6 members= 41*6=246
avg of present ages of 7 members= 48
total of present agesof 7 members= 48*7=336
age of 7th member= 336-246= 90 years...
13 years agoHelpfull: Yes(15) No(3)

total age 4 yr hence of 6 persons=45x6=270
now there avg age become=(270+24+k)/7 which is equal to 48
solving we will get k=42
13 years agoHelpfull: Yes(4) No(7)
sum of age of 6 person in 4 yr hence,6*45=270
present age of 6 person,270-24=246
after adding new person, sum of age of 7 person,7*48=336
so, age of 7th member,336-246=90
13 years agoHelpfull: Yes(3) No(0)

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