The average of 10 numbers is 10.9 and that of higher 4 numbers among these 10 numbers is 11.5. A

M4maths Previous Puzzles

20 Dec 2010 Fine the average

The average of 10 numbers is 10.9 and that of higher 4 numbers among these 10 numbers is 11.5.
Average of lower 6 numbers will be

OPtion

1) 10.3
2) 10.6
3) 10.7
4) 10.8
5) 10.4
6) 10.5
7) 10.2
8) 10.1
9) 10
10) 9.9

Solution

Sum of all the 10 numbers = 10.9 * 10 = 109
Sum of higher 4 numbers = 11.5 * 4 = 46
Sum of lower 6 numbers = 109 – 46 = 63
Average = 63 / 6 = 10.5

Correct Option: 6 Best Solution (13)

YadeeshKumar   13 years AGO

the avg of 10 numbers is 10.9,
the sum is 109.
the higher 4 numbers avg is 11.5 and their sum is 46.
therefore 109-46=63(last 6 persons total)
their avg is 63/6=10.5

Like? Yes (1) | No   

KALPANA G   13 years AGO

10 numbers sum is 10.9*10=109
4 numbers sum is 11.5*4=46
so, 6 numbers sum is 109-46=63
so, 6 numbers average is 63/6 = 10.5

Like? Yes (1) | No   

susmit   13 years AGO

10.9*10=109
11.5*4=46
109-46=63
63/6=10.5

Like? Yes (1) | No   

KAMALESH CHAKRABORTY   13 years AGO

sum of 10 numbers= 10*10.9=109
sum of 4 numbers= 4*11.5= 46

sum of 6 numbers =sum of 10 numbers - sum of 4 numbers i.e. 109-46=63
so average of 6 numbers= 63/6 =10.5

Like? Yes (1) | No   

Dr.Dipin Singh   13 years AGO

The average of 10 numbers is 10.9 and total of 10 numbers is 109 and that of higher 4 numbers among these 10 numbers is 11.5 and sum of higher 4 numbers among these 10 numbers is 46.
sum of lower 6 numbers will be 109-46 =63 and
Average of lower 6 numbers will be 63/6=10.5

Like? Yes (1) | No   

SUDESHNA SEN   13 years AGO

Total of 10 numbers= 10*10.9= 109
Total of higher 4 numbers= 4*11.5= 46
So, total of lower 6 numbers= 109-46= 63.
So, average of lower 6 numbers= (63/6)= 10.5..... Option 6)

Like? Yes (1) | No   

Mamon Sengupta   13 years AGO

Total of 10 numbers= 10*10.9= 109
Total of higher 4 numbers= 4*11.5= 46
So, total of lower 6 numbers= 109-46= 63.
So, average of lower 6 numbers= (63/6)= 10.5..... Option 6)

Like? Yes (1) | No   

Trishita Dasgupta   13 years AGO

Total of 10 numbers= 10*10.9= 109
Total of higher 4 numbers= 4*11.5= 46
So, total of lower 6 numbers= 109-46= 63.
So, average of lower 6 numbers= (63/6)= 10.5..... Option 6)

Like? Yes (1) | No   

ASHOK ROY   13 years AGO

Total of 10 numbers= 10*10.9= 109
Total of higher 4 numbers= 4*11.5= 46
So, total of lower 6 numbers= 109-46= 63.
So, average of lower 6 numbers= (63/6)= 10.5..... Option 6)

Like? Yes (1) | No   

Sudeshna Sengupta   13 years AGO

Total of 10 numbers= 10*10.9= 109
Total of higher 4 numbers= 4*11.5= 46
So, total of lower 6 numbers= 109-46= 63.
So, average of lower 6 numbers= (63/6)= 10.5..... Option 6)

Like? Yes (1) | No   

JAYEETA DESHMUKH   13 years AGO

Total of 10 numbers= 10*10.9= 109
Total of higher 4 numbers= 4*11.5= 46
So, total of lower 6 numbers= 109-46= 63.
So, average of lower 6 numbers= (63/6)= 10.5..... Option 6)

Like? Yes (1) | No   

kamal   13 years AGO

Total of 10 numbers= 10*10.9= 109
Total of higher 4 numbers= 4*11.5= 46
So, total of lower 6 numbers= 109-46= 63.
So, average of lower 6 numbers= (63/6)= 10.5..... Option 6)

Like? Yes (1) | No   

Eliza    13 years AGO

109-46=63.
63/6=10.5

Like? Yes (1) | No