Question

the mean of 5 numbers is 40 if one number is excluded the mean becomes 38, then the excluded number is ?

Answer 1

Answer:

48

Step-by-step explanation:

mean=sum of observations/total observations

40=sum of observations/5

sum of observation =200

if one number is excluded,the number of observation =4 let the excluded number be x

mean or 38= 200-x/4

38×4=200-x

152=200-x

x=200-152or 48

the excluded number is 48