Find the mean of 32 numbers, such that if the mean of the first 10 number is 15 and the mean of the first 20 numbers is 11.The last two numbers are 10
Answers
Answered by
2
Answer:
390 upon 32
Step-by-step explanation:
follow me my friends
Answered by
1
Answer:
The given mean of 10 numbers = 15
So, Mean of 10 numbers = sum of observations/ no. of observations
15 = sum of observations / 10
Sum of observations of 10 numbers = 150
Similarly, Mean of 20 numbers = sum of observations/ no. of observations
11 = sum of observations / 20
Sum of observations of 20 numbers = 220
Hence, Mean of 32 numbers = (sum 10 numbers+sum of 20 numbers +sum of last two numbers)/ no. of observations
Mean of 32 numbers = (150 +220 + 20 ) / 32 = 390 /32 = 12.188
Step-by-step explanation:
Similar questions