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In a supermarket average of 4people standin in queue taken 2yrs before is 55yrs. Now a person of 45 yrs is added current age.

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let total age now = x
2 yeras before = (x-8)/4=55
x=228
so average now (228+45)/5=54.6
12 years agoHelpfull: Yes(15) No(0)

average age now= 55+2= 57 yrs. afte the addition of new person av age = 57- 12/5= 54.6
12 years agoHelpfull: Yes(2) No(2)

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