Saved Bookmarks
| 1. |
SSC Test Questions Three years ago the average age of A and B was 18 years. If C joins them today, the average becomes 22 years. How old is C now? |
|
Answer» of A and B = 18 yearsSo, (A+B)÷2 = 18Now after three years and adding C,(A+B+C)÷3 +3 = 22, Equation-{1}So, (A+B+C+9)÷3 = 22 A+B+C+9 = 66 A+B+C = 57 A+B = 57-CSo, Putting value of A+B in Equation 1,(57-C)÷2 = 1857-C = 36So, C = 57-36 = 21So, C will be 21 years old. |
|