The mean of 24 numbers is 35. If 3 is added to each number, what will be the new mean?
Given,
Mean of 24 numbers = 35
Sum of these numbers = 24 × 35 = 840.
Every number is increased by 3,
Total increment = 24 × 3 = 72
New sum = 840 + 72 = 912
New Mean = 
7