Q.141- The average weight of 3 men, A, B and C is 84 kg. Another man D joins the group and the average now becomes 80 kg. If another man E whose weight is 3 kg more than that of D, replaces A then the average weight of B, C, D and E becomes 79 kg. What is the weight of A ?
Q.142- If the average of x and $$\frac{1}{x}$$ (x ≠ 0) is M, then the average of x2 and $$\frac{1}{x^{2}}$$ is :
Q.143- The mean high temperature of the first four days of a week is 25°C whereas the mean of the last four days is 25.5°C. If the mean of the whole week is 25.2°C then the temperature of the 4th day is :
Q.144- Mukesh has twice as much money as Soham. Soham has 50% more money than Pankaj. If the average money with them is Rs. 110, then Mukesh has :
Q.145- Out of four numbers the average of the first three is 16 and that of the last three is 15. If the last number is 20, than first number is :