Question

mean of 29 observation 33 and on adding one more observation the new mean
become 34 what is the value of 30th observation.
​

Answer 1

Answer:

Sum of 6 numbers =60×30=180

Sum of first 4 numbers =4×25=100

Sum of last 3 numbers =3×35=105

∴ Fourth number =(100+105)−180

=205−180

=25