Question

9. If the mean of five observations x+2, 2x+3, 3x+4 and 4x+7 is 24, find the mean of
the first three observations.​

Answer 1

Answer:

x+2+2x+3+3x+4÷3

6x+9÷3

x=15÷3

=5

x=5

first observation

x+2=5+2=7

second observation

2x+3=2(5) +3=10+3=13

third observation

3x+4=3(5) +4=15+4=19