TCS Company Numerical Ability Age Problem

In a market 4 man are standing .the average age of the four before 4years is 45, after some days one man is added and his age is 49.what is the average weight of all?

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TCS Other Question

Vinay wlked 2 km to reach school.one day,he was sick,he walked with speed 20% less than before while going and returning.what was the percentage increase i n time,in the entire journey?? If A= 0 0 0 0 1 1 1 1 B= 0 0 1 1 0 0 1 1 C= 0 1 0 1 0 1 0 1 Then find the value of [A U C] U B and express it in decimal.