The number of observations in a group is 40. If the average of first 10 observations is 4.5 and the next 30 observations is 3. Find the average of whole group.
Question
Solution 1
To find the average of the whole group, we need to find the total sum of all observations and then divide it by the total number of observations.
Step 1: Find the sum of the first 10 observations The average of the first 10 observations is 4.5, so the total sum of these observations is 4.5 * 10 = 4 Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study prob
Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study problem.
Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study problem.
Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study problem.
Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solv
Similar Questions
The number of observations in a group is 40. If the average of first 10 observations is 4.5 and the next 30 observations is 3. Find the average of whole group.
The average of six numbers is 30. If the average of first four is 25 and that of last three is 35, the fourth number is:
The average of six numbers is 30. If the average of first four is 25 and that of last three is 35, the fourth number is:Options :25303540
The average of 9 numbers is 30.If the average of first '5' numbers is 25 and that of the last '3' number is 35.Then the 6th number?30405060
f average marks for agroup of 30 girls is 80 , a group of boys is 70 and combined average is 76, then howmany boys are in the group ?(a) 21(b) 20(c) 22(d) 19