ICSE Class 7 Answered

The average of 50 numbers is 20. If two numbers 37, 43 are discarded, find the average of the remaining numbers.

Asked by Topperlearning User | 19 Sep, 2016, 10:20: AM

Expert Answer

$Average space of space 50 space numbers space is space equals space 20 therefore Total space sum space of space numbers space equals space 50 cross times 20 space equals space 1000 Sum space of space two space number space which space are space discarded space equals space 37 space plus space 43 space equals space 80 Sum space of space the space remaining space numbers space equals space 1000 minus 80 space equals space 920 Count space of space remainig space numbers space equals space 50 space minus space 2 space equals space 48 therefore Average space of space 48 space numbers space equals space 920 over 48 equals 19.16 Average space of space the space remaining space numbers space space is space 19.16.$