In a shopping mall with staff of 5 members the average age is 45 years. After 5 years a person joined them and the average age is again 45 years. What is the age of 6th person?	Choices
A) 15 yrs B) 16 yrs C) 17 yrs D) 19 yrs E) 20 yrs
avg age of 5 person after 5 yrs will be 50 yrs..   so total age of 5 person = 50*5= 
<gadget id="calculator">50*5</gadget>
<output>250</output>
250   and total age of 6 person= 45*6= 
<gadget id="calculator">45*6</gadget>
<output>270</output>
270   so age of 6th person= 270-250= 
<gadget id="calculator">270-250</gadget>
<output>20</output>
20 yrs   ANSW20 yrsR:20 yrs
<result>E</result>
In a shopping mall with staff of 5 members the average age is 45 years. After 5 years a person joined them and the average age is again 45 years. What is the age of 6th person?