Question

of the mean of a set of observation X1,X2,x3,x4,x5,x6,x7,x8,x9,X10 is 20 .Find the mean of the X1+4,X2+8,x3+12,x4+16,x5+20,x6+24,x7+28,x8+32,x9+36,X10+40​

Answer 1

Answer is 36.

Because 1 x 2 = 2. 1 x 3 = 3. 1 x 4 = 4. 1 x 5 = 5. 1 x 6 = 6. 1 x 7 = 7. 1 x 8 = 8. 1 x 9 = 9. 1 x 10 = 10. 1 x 11 = ... 4 x 1 = 4. 4 x 2 = 8. 4 x 3 = 12. 4 x 4 = 16. 4 x 5 = 20. 4 x 6 = 24. 4 x 7 = 28. 4 x 8 = 32. 4 x 9 = 36.

Answer 2

Answer:

OK LeT me calculate

Step-by-step explanation:

Mean

it means that sum of all numbers upon total number of numbers

taking x common

x(1+2+3+4+5+6+7+8+9+10). = 20

10

55x = 20

10

x = 20×10

55

x = 200 = 3.63

55

Value of x is 3.63

Now calculate the mean of seperate numbers

4,8,12,16,20,24,28,32,36,40

which equals to 220/10 = 22

now add both

20 + 22 = 42