Question

10 years ago, the average age of 10 people was 33 years. after 3 years, a person of age 40 died. after another 3 years, another person of age 40 died. after another 3 years, another person of age 30 dies. find the present

Answer 1

the total age of all ten persons before 10 years was 10* 33 = 330
after three years there total age will be 330 + 30 = 360 and then. man of 40 years age died so their age would be 360-40 = 320 (for 9 people ) after three years there age must be 320+3*9 = 347 but again a person of 40 died so age left is 307( of 8 people ) after 3 years their age must be 307+8*3 = 331 but a person of 30 dies so age reamins 301( of 7 people ) after 1 year their age should be 301+7 = 308
if you wanna find average age then (308/7) = 44